diff --git a/src/Analyzers/ColorspaceAnalyzer.php b/src/Analyzers/ColorspaceAnalyzer.php
index 15322e29..243705e6 100644
--- a/src/Analyzers/ColorspaceAnalyzer.php
+++ b/src/Analyzers/ColorspaceAnalyzer.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Analyzers;
 
 class ColorspaceAnalyzer extends SpecializableAnalyzer
diff --git a/src/Analyzers/HeightAnalyzer.php b/src/Analyzers/HeightAnalyzer.php
index 73fe404e..6fe5c482 100644
--- a/src/Analyzers/HeightAnalyzer.php
+++ b/src/Analyzers/HeightAnalyzer.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Analyzers;
 
 class HeightAnalyzer extends SpecializableAnalyzer
diff --git a/src/Analyzers/PixelColorAnalyzer.php b/src/Analyzers/PixelColorAnalyzer.php
index 0afc0adc..c422016e 100644
--- a/src/Analyzers/PixelColorAnalyzer.php
+++ b/src/Analyzers/PixelColorAnalyzer.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Analyzers;
 
 class PixelColorAnalyzer extends SpecializableAnalyzer
diff --git a/src/Analyzers/PixelColorsAnalyzer.php b/src/Analyzers/PixelColorsAnalyzer.php
index 8e5917a1..b93754f5 100644
--- a/src/Analyzers/PixelColorsAnalyzer.php
+++ b/src/Analyzers/PixelColorsAnalyzer.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Analyzers;
 
 class PixelColorsAnalyzer extends SpecializableAnalyzer
diff --git a/src/Analyzers/ProfileAnalyzer.php b/src/Analyzers/ProfileAnalyzer.php
index a4b3194a..e9bdd60e 100644
--- a/src/Analyzers/ProfileAnalyzer.php
+++ b/src/Analyzers/ProfileAnalyzer.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Analyzers;
 
 class ProfileAnalyzer extends SpecializableAnalyzer
diff --git a/src/Analyzers/ResolutionAnalyzer.php b/src/Analyzers/ResolutionAnalyzer.php
index 0bd3a54d..9aa27f4a 100644
--- a/src/Analyzers/ResolutionAnalyzer.php
+++ b/src/Analyzers/ResolutionAnalyzer.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Analyzers;
 
 class ResolutionAnalyzer extends SpecializableAnalyzer
diff --git a/src/Analyzers/SpecializableAnalyzer.php b/src/Analyzers/SpecializableAnalyzer.php
index 2877e228..3dcbbbb1 100644
--- a/src/Analyzers/SpecializableAnalyzer.php
+++ b/src/Analyzers/SpecializableAnalyzer.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Analyzers;
 
 use Intervention\Image\Interfaces\AnalyzerInterface;
diff --git a/src/Analyzers/WidthAnalyzer.php b/src/Analyzers/WidthAnalyzer.php
index be8a6c99..a1389f29 100644
--- a/src/Analyzers/WidthAnalyzer.php
+++ b/src/Analyzers/WidthAnalyzer.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Analyzers;
 
 class WidthAnalyzer extends SpecializableAnalyzer
diff --git a/src/Collection.php b/src/Collection.php
index d438257e..e4e4c32d 100644
--- a/src/Collection.php
+++ b/src/Collection.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image;
 
 use Intervention\Image\Exceptions\RuntimeException;
@@ -136,7 +138,7 @@ class Collection implements CollectionInterface, IteratorAggregate, Countable
             return array_key_exists($query, $this->items) ? $this->items[$query] : $default;
         }
 
-        $query = explode('.', $query);
+        $query = explode('.', (string) $query);
 
         $result = $default;
         $items = $this->items;
diff --git a/src/Colors/AbstractColor.php b/src/Colors/AbstractColor.php
index be73c770..5faf773d 100644
--- a/src/Colors/AbstractColor.php
+++ b/src/Colors/AbstractColor.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Colors;
 
 use Intervention\Image\Exceptions\ColorException;
diff --git a/src/Colors/AbstractColorChannel.php b/src/Colors/AbstractColorChannel.php
index a2d0db7b..ef0ba701 100644
--- a/src/Colors/AbstractColorChannel.php
+++ b/src/Colors/AbstractColorChannel.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Colors;
 
 use Intervention\Image\Exceptions\ColorException;
diff --git a/src/Colors/Cmyk/Channels/Cyan.php b/src/Colors/Cmyk/Channels/Cyan.php
index d0ac4612..f56b095c 100644
--- a/src/Colors/Cmyk/Channels/Cyan.php
+++ b/src/Colors/Cmyk/Channels/Cyan.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Colors\Cmyk\Channels;
 
 use Intervention\Image\Colors\AbstractColorChannel;
diff --git a/src/Colors/Cmyk/Channels/Key.php b/src/Colors/Cmyk/Channels/Key.php
index 2893d2af..b1f221d9 100644
--- a/src/Colors/Cmyk/Channels/Key.php
+++ b/src/Colors/Cmyk/Channels/Key.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Colors\Cmyk\Channels;
 
 class Key extends Cyan
diff --git a/src/Colors/Cmyk/Channels/Magenta.php b/src/Colors/Cmyk/Channels/Magenta.php
index 7c255e8f..26ab1d43 100644
--- a/src/Colors/Cmyk/Channels/Magenta.php
+++ b/src/Colors/Cmyk/Channels/Magenta.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Colors\Cmyk\Channels;
 
 class Magenta extends Cyan
diff --git a/src/Colors/Cmyk/Channels/Yellow.php b/src/Colors/Cmyk/Channels/Yellow.php
index 7446e522..311c93f0 100644
--- a/src/Colors/Cmyk/Channels/Yellow.php
+++ b/src/Colors/Cmyk/Channels/Yellow.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Colors\Cmyk\Channels;
 
 class Yellow extends Cyan
diff --git a/src/Colors/Cmyk/Color.php b/src/Colors/Cmyk/Color.php
index 517e0bb6..b3afe377 100644
--- a/src/Colors/Cmyk/Color.php
+++ b/src/Colors/Cmyk/Color.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Colors\Cmyk;
 
 use Intervention\Image\Colors\AbstractColor;
diff --git a/src/Colors/Cmyk/Colorspace.php b/src/Colors/Cmyk/Colorspace.php
index e67072b2..fe47d7f0 100644
--- a/src/Colors/Cmyk/Colorspace.php
+++ b/src/Colors/Cmyk/Colorspace.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Colors\Cmyk;
 
 use Intervention\Image\Colors\Rgb\Color as RgbColor;
diff --git a/src/Colors/Cmyk/Decoders/StringColorDecoder.php b/src/Colors/Cmyk/Decoders/StringColorDecoder.php
index 02fb5c4a..d4c58550 100644
--- a/src/Colors/Cmyk/Decoders/StringColorDecoder.php
+++ b/src/Colors/Cmyk/Decoders/StringColorDecoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Colors\Cmyk\Decoders;
 
 use Intervention\Image\Colors\Cmyk\Color;
diff --git a/src/Colors/Hsl/Channels/Hue.php b/src/Colors/Hsl/Channels/Hue.php
index e795aebb..049a849c 100644
--- a/src/Colors/Hsl/Channels/Hue.php
+++ b/src/Colors/Hsl/Channels/Hue.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Colors\Hsl\Channels;
 
 use Intervention\Image\Colors\AbstractColorChannel;
diff --git a/src/Colors/Hsl/Channels/Luminance.php b/src/Colors/Hsl/Channels/Luminance.php
index 77aa34cf..c1223fc6 100644
--- a/src/Colors/Hsl/Channels/Luminance.php
+++ b/src/Colors/Hsl/Channels/Luminance.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Colors\Hsl\Channels;
 
 use Intervention\Image\Colors\AbstractColorChannel;
diff --git a/src/Colors/Hsl/Channels/Saturation.php b/src/Colors/Hsl/Channels/Saturation.php
index c63d20df..fe2c77b4 100644
--- a/src/Colors/Hsl/Channels/Saturation.php
+++ b/src/Colors/Hsl/Channels/Saturation.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Colors\Hsl\Channels;
 
 use Intervention\Image\Colors\AbstractColorChannel;
diff --git a/src/Colors/Hsl/Color.php b/src/Colors/Hsl/Color.php
index 674980f4..b0bb6147 100644
--- a/src/Colors/Hsl/Color.php
+++ b/src/Colors/Hsl/Color.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Colors\Hsl;
 
 use Intervention\Image\Colors\AbstractColor;
diff --git a/src/Colors/Hsl/Colorspace.php b/src/Colors/Hsl/Colorspace.php
index 7a26cfde..e3c7e421 100644
--- a/src/Colors/Hsl/Colorspace.php
+++ b/src/Colors/Hsl/Colorspace.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Colors\Hsl;
 
 use Intervention\Image\Colors\Cmyk\Color as CmykColor;
diff --git a/src/Colors/Hsl/Decoders/StringColorDecoder.php b/src/Colors/Hsl/Decoders/StringColorDecoder.php
index f99af524..e8d55f1e 100644
--- a/src/Colors/Hsl/Decoders/StringColorDecoder.php
+++ b/src/Colors/Hsl/Decoders/StringColorDecoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Colors\Hsl\Decoders;
 
 use Intervention\Image\Colors\Hsl\Color;
diff --git a/src/Colors/Hsv/Channels/Hue.php b/src/Colors/Hsv/Channels/Hue.php
index d578e54d..bbfc1feb 100644
--- a/src/Colors/Hsv/Channels/Hue.php
+++ b/src/Colors/Hsv/Channels/Hue.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Colors\Hsv\Channels;
 
 use Intervention\Image\Colors\AbstractColorChannel;
diff --git a/src/Colors/Hsv/Channels/Saturation.php b/src/Colors/Hsv/Channels/Saturation.php
index 0c52da14..6b4b2e47 100644
--- a/src/Colors/Hsv/Channels/Saturation.php
+++ b/src/Colors/Hsv/Channels/Saturation.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Colors\Hsv\Channels;
 
 use Intervention\Image\Colors\AbstractColorChannel;
diff --git a/src/Colors/Hsv/Channels/Value.php b/src/Colors/Hsv/Channels/Value.php
index b88fabb6..cafaacda 100644
--- a/src/Colors/Hsv/Channels/Value.php
+++ b/src/Colors/Hsv/Channels/Value.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Colors\Hsv\Channels;
 
 use Intervention\Image\Colors\AbstractColorChannel;
diff --git a/src/Colors/Hsv/Color.php b/src/Colors/Hsv/Color.php
index 251b7570..01d2bbba 100644
--- a/src/Colors/Hsv/Color.php
+++ b/src/Colors/Hsv/Color.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Colors\Hsv;
 
 use Intervention\Image\Colors\AbstractColor;
diff --git a/src/Colors/Hsv/Colorspace.php b/src/Colors/Hsv/Colorspace.php
index 229ffaf8..01d97013 100644
--- a/src/Colors/Hsv/Colorspace.php
+++ b/src/Colors/Hsv/Colorspace.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Colors\Hsv;
 
 use Intervention\Image\Colors\Cmyk\Color as CmykColor;
diff --git a/src/Colors/Hsv/Decoders/StringColorDecoder.php b/src/Colors/Hsv/Decoders/StringColorDecoder.php
index 4d0621a0..123ad21b 100644
--- a/src/Colors/Hsv/Decoders/StringColorDecoder.php
+++ b/src/Colors/Hsv/Decoders/StringColorDecoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Colors\Hsv\Decoders;
 
 use Intervention\Image\Colors\Hsv\Color;
diff --git a/src/Colors/Profile.php b/src/Colors/Profile.php
index 55194f45..37d9ce73 100644
--- a/src/Colors/Profile.php
+++ b/src/Colors/Profile.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Colors;
 
 use Intervention\Image\File;
diff --git a/src/Colors/Rgb/Channels/Alpha.php b/src/Colors/Rgb/Channels/Alpha.php
index 3d743c0e..c37d4f6a 100644
--- a/src/Colors/Rgb/Channels/Alpha.php
+++ b/src/Colors/Rgb/Channels/Alpha.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Colors\Rgb\Channels;
 
 class Alpha extends Red
diff --git a/src/Colors/Rgb/Channels/Blue.php b/src/Colors/Rgb/Channels/Blue.php
index df5d56b0..1be1610b 100644
--- a/src/Colors/Rgb/Channels/Blue.php
+++ b/src/Colors/Rgb/Channels/Blue.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Colors\Rgb\Channels;
 
 class Blue extends Red
diff --git a/src/Colors/Rgb/Channels/Green.php b/src/Colors/Rgb/Channels/Green.php
index 93c85ceb..adf01444 100644
--- a/src/Colors/Rgb/Channels/Green.php
+++ b/src/Colors/Rgb/Channels/Green.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Colors\Rgb\Channels;
 
 class Green extends Red
diff --git a/src/Colors/Rgb/Channels/Red.php b/src/Colors/Rgb/Channels/Red.php
index 0e18bb30..e6929471 100644
--- a/src/Colors/Rgb/Channels/Red.php
+++ b/src/Colors/Rgb/Channels/Red.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Colors\Rgb\Channels;
 
 use Intervention\Image\Colors\AbstractColorChannel;
diff --git a/src/Colors/Rgb/Color.php b/src/Colors/Rgb/Color.php
index 7de9e7b9..207031e1 100644
--- a/src/Colors/Rgb/Color.php
+++ b/src/Colors/Rgb/Color.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Colors\Rgb;
 
 use Intervention\Image\Colors\AbstractColor;
diff --git a/src/Colors/Rgb/Colorspace.php b/src/Colors/Rgb/Colorspace.php
index 12487e71..a313cec3 100644
--- a/src/Colors/Rgb/Colorspace.php
+++ b/src/Colors/Rgb/Colorspace.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Colors\Rgb;
 
 use Intervention\Image\Colors\Hsv\Color as HsvColor;
diff --git a/src/Colors/Rgb/Decoders/HexColorDecoder.php b/src/Colors/Rgb/Decoders/HexColorDecoder.php
index c209f6f9..c419a61f 100644
--- a/src/Colors/Rgb/Decoders/HexColorDecoder.php
+++ b/src/Colors/Rgb/Decoders/HexColorDecoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Colors\Rgb\Decoders;
 
 use Intervention\Image\Colors\Rgb\Color;
diff --git a/src/Colors/Rgb/Decoders/HtmlColornameDecoder.php b/src/Colors/Rgb/Decoders/HtmlColornameDecoder.php
index 8676b1f7..ac721c4a 100644
--- a/src/Colors/Rgb/Decoders/HtmlColornameDecoder.php
+++ b/src/Colors/Rgb/Decoders/HtmlColornameDecoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Colors\Rgb\Decoders;
 
 use Intervention\Image\Exceptions\DecoderException;
diff --git a/src/Colors/Rgb/Decoders/StringColorDecoder.php b/src/Colors/Rgb/Decoders/StringColorDecoder.php
index 26481388..559fc359 100644
--- a/src/Colors/Rgb/Decoders/StringColorDecoder.php
+++ b/src/Colors/Rgb/Decoders/StringColorDecoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Colors\Rgb\Decoders;
 
 use Intervention\Image\Colors\Rgb\Color;
diff --git a/src/Colors/Rgb/Decoders/TransparentColorDecoder.php b/src/Colors/Rgb/Decoders/TransparentColorDecoder.php
index 156a48a5..e31fdd4b 100644
--- a/src/Colors/Rgb/Decoders/TransparentColorDecoder.php
+++ b/src/Colors/Rgb/Decoders/TransparentColorDecoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Colors\Rgb\Decoders;
 
 use Intervention\Image\Exceptions\DecoderException;
diff --git a/src/Decoders/Base64ImageDecoder.php b/src/Decoders/Base64ImageDecoder.php
index 42b5c578..aa687246 100644
--- a/src/Decoders/Base64ImageDecoder.php
+++ b/src/Decoders/Base64ImageDecoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Decoders;
 
 class Base64ImageDecoder extends SpecializableDecoder
diff --git a/src/Decoders/BinaryImageDecoder.php b/src/Decoders/BinaryImageDecoder.php
index 5b42857e..57e9f266 100644
--- a/src/Decoders/BinaryImageDecoder.php
+++ b/src/Decoders/BinaryImageDecoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Decoders;
 
 class BinaryImageDecoder extends SpecializableDecoder
diff --git a/src/Decoders/DataUriImageDecoder.php b/src/Decoders/DataUriImageDecoder.php
index 9e8a92d9..065850c6 100644
--- a/src/Decoders/DataUriImageDecoder.php
+++ b/src/Decoders/DataUriImageDecoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Decoders;
 
 class DataUriImageDecoder extends SpecializableDecoder
diff --git a/src/Decoders/FilePathImageDecoder.php b/src/Decoders/FilePathImageDecoder.php
index 8ced81b2..c98a9be6 100644
--- a/src/Decoders/FilePathImageDecoder.php
+++ b/src/Decoders/FilePathImageDecoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Decoders;
 
 class FilePathImageDecoder extends SpecializableDecoder
diff --git a/src/Decoders/FilePointerImageDecoder.php b/src/Decoders/FilePointerImageDecoder.php
index dcb7847a..fee9d16e 100644
--- a/src/Decoders/FilePointerImageDecoder.php
+++ b/src/Decoders/FilePointerImageDecoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Decoders;
 
 class FilePointerImageDecoder extends SpecializableDecoder
diff --git a/src/Decoders/ImageObjectDecoder.php b/src/Decoders/ImageObjectDecoder.php
index 1441e48e..0b3209e9 100644
--- a/src/Decoders/ImageObjectDecoder.php
+++ b/src/Decoders/ImageObjectDecoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Decoders;
 
 class ImageObjectDecoder extends SpecializableDecoder
diff --git a/src/Decoders/SpecializableDecoder.php b/src/Decoders/SpecializableDecoder.php
index f2b1eb8c..fcf26264 100644
--- a/src/Decoders/SpecializableDecoder.php
+++ b/src/Decoders/SpecializableDecoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Decoders;
 
 use Intervention\Image\Exceptions\DecoderException;
diff --git a/src/Decoders/SplFileInfoImageDecoder.php b/src/Decoders/SplFileInfoImageDecoder.php
index 29119003..a0fe7045 100644
--- a/src/Decoders/SplFileInfoImageDecoder.php
+++ b/src/Decoders/SplFileInfoImageDecoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Decoders;
 
 class SplFileInfoImageDecoder extends SpecializableDecoder
diff --git a/src/Drivers/AbstractDecoder.php b/src/Drivers/AbstractDecoder.php
index f17f4c97..41e4ee07 100644
--- a/src/Drivers/AbstractDecoder.php
+++ b/src/Drivers/AbstractDecoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers;
 
 use Exception;
@@ -59,7 +61,7 @@ abstract class AbstractDecoder extends DriverSpecialized implements DecoderInter
      */
     protected function isGifFormat(string $input): bool
     {
-        return preg_match(
+        return 1 === preg_match(
             "/^47494638(37|39)61/",
             strtoupper(substr(bin2hex($input), 0, 32))
         );
diff --git a/src/Drivers/AbstractDrawModifier.php b/src/Drivers/AbstractDrawModifier.php
index a563f8df..047730d3 100644
--- a/src/Drivers/AbstractDrawModifier.php
+++ b/src/Drivers/AbstractDrawModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers;
 
 use Intervention\Image\Exceptions\DecoderException;
diff --git a/src/Drivers/AbstractDriver.php b/src/Drivers/AbstractDriver.php
index 6f645c89..17a1a2d2 100644
--- a/src/Drivers/AbstractDriver.php
+++ b/src/Drivers/AbstractDriver.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers;
 
 use Intervention\Image\Exceptions\NotSupportedException;
diff --git a/src/Drivers/AbstractInputHandler.php b/src/Drivers/AbstractInputHandler.php
index 5eae3eb6..b074e51c 100644
--- a/src/Drivers/AbstractInputHandler.php
+++ b/src/Drivers/AbstractInputHandler.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers;
 
 use Intervention\Image\Drivers\AbstractDecoder;
diff --git a/src/Drivers/AbstractTextModifier.php b/src/Drivers/AbstractTextModifier.php
index f0691c7d..cc34e6e3 100644
--- a/src/Drivers/AbstractTextModifier.php
+++ b/src/Drivers/AbstractTextModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers;
 
 use Intervention\Image\Geometry\Point;
diff --git a/src/Drivers/DriverSpecialized.php b/src/Drivers/DriverSpecialized.php
index 4cd173aa..a51233df 100644
--- a/src/Drivers/DriverSpecialized.php
+++ b/src/Drivers/DriverSpecialized.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers;
 
 use Intervention\Image\Interfaces\DriverInterface;
diff --git a/src/Drivers/DriverSpecializedEncoder.php b/src/Drivers/DriverSpecializedEncoder.php
index 038ccd7f..ba3762e3 100644
--- a/src/Drivers/DriverSpecializedEncoder.php
+++ b/src/Drivers/DriverSpecializedEncoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers;
 
 use Intervention\Image\Interfaces\EncoderInterface;
diff --git a/src/Drivers/Gd/Analyzers/ColorspaceAnalyzer.php b/src/Drivers/Gd/Analyzers/ColorspaceAnalyzer.php
index 2ae446d2..ece921ff 100644
--- a/src/Drivers/Gd/Analyzers/ColorspaceAnalyzer.php
+++ b/src/Drivers/Gd/Analyzers/ColorspaceAnalyzer.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Analyzers;
 
 use Intervention\Image\Colors\Rgb\Colorspace;
diff --git a/src/Drivers/Gd/Analyzers/HeightAnalyzer.php b/src/Drivers/Gd/Analyzers/HeightAnalyzer.php
index 6eccce5e..a0dc8a59 100644
--- a/src/Drivers/Gd/Analyzers/HeightAnalyzer.php
+++ b/src/Drivers/Gd/Analyzers/HeightAnalyzer.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Analyzers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Gd/Analyzers/PixelColorAnalyzer.php b/src/Drivers/Gd/Analyzers/PixelColorAnalyzer.php
index cebd0beb..be565ba1 100644
--- a/src/Drivers/Gd/Analyzers/PixelColorAnalyzer.php
+++ b/src/Drivers/Gd/Analyzers/PixelColorAnalyzer.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Analyzers;
 
 use GdImage;
diff --git a/src/Drivers/Gd/Analyzers/PixelColorsAnalyzer.php b/src/Drivers/Gd/Analyzers/PixelColorsAnalyzer.php
index 10e28f92..1ddbe361 100644
--- a/src/Drivers/Gd/Analyzers/PixelColorsAnalyzer.php
+++ b/src/Drivers/Gd/Analyzers/PixelColorsAnalyzer.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Analyzers;
 
 use Intervention\Image\Collection;
diff --git a/src/Drivers/Gd/Analyzers/ResolutionAnalyzer.php b/src/Drivers/Gd/Analyzers/ResolutionAnalyzer.php
index 39efde0d..18c8aa0e 100644
--- a/src/Drivers/Gd/Analyzers/ResolutionAnalyzer.php
+++ b/src/Drivers/Gd/Analyzers/ResolutionAnalyzer.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Analyzers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Gd/Analyzers/WidthAnalyzer.php b/src/Drivers/Gd/Analyzers/WidthAnalyzer.php
index fbe4522b..26c824ce 100644
--- a/src/Drivers/Gd/Analyzers/WidthAnalyzer.php
+++ b/src/Drivers/Gd/Analyzers/WidthAnalyzer.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Analyzers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Gd/Cloner.php b/src/Drivers/Gd/Cloner.php
index 6b6fd0ad..ca668d50 100644
--- a/src/Drivers/Gd/Cloner.php
+++ b/src/Drivers/Gd/Cloner.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd;
 
 use GdImage;
diff --git a/src/Drivers/Gd/ColorProcessor.php b/src/Drivers/Gd/ColorProcessor.php
index cbb593e4..e7b5ba3f 100644
--- a/src/Drivers/Gd/ColorProcessor.php
+++ b/src/Drivers/Gd/ColorProcessor.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd;
 
 use Intervention\Image\Colors\Rgb\Channels\Alpha;
diff --git a/src/Drivers/Gd/Core.php b/src/Drivers/Gd/Core.php
index c790fa71..a00d68ff 100644
--- a/src/Drivers/Gd/Core.php
+++ b/src/Drivers/Gd/Core.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd;
 
 use Intervention\Image\Collection;
diff --git a/src/Drivers/Gd/Decoders/Base64ImageDecoder.php b/src/Drivers/Gd/Decoders/Base64ImageDecoder.php
index cdee5d41..0b6c7531 100644
--- a/src/Drivers/Gd/Decoders/Base64ImageDecoder.php
+++ b/src/Drivers/Gd/Decoders/Base64ImageDecoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Decoders;
 
 use Intervention\Image\Exceptions\DecoderException;
diff --git a/src/Drivers/Gd/Decoders/BinaryImageDecoder.php b/src/Drivers/Gd/Decoders/BinaryImageDecoder.php
index cb1ed6c8..8afb16ac 100644
--- a/src/Drivers/Gd/Decoders/BinaryImageDecoder.php
+++ b/src/Drivers/Gd/Decoders/BinaryImageDecoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Decoders;
 
 use Intervention\Image\Drivers\AbstractDecoder;
diff --git a/src/Drivers/Gd/Decoders/ColorObjectDecoder.php b/src/Drivers/Gd/Decoders/ColorObjectDecoder.php
index 5dfeb78c..cd3477c3 100644
--- a/src/Drivers/Gd/Decoders/ColorObjectDecoder.php
+++ b/src/Drivers/Gd/Decoders/ColorObjectDecoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Decoders;
 
 use Intervention\Image\Drivers\AbstractDecoder;
diff --git a/src/Drivers/Gd/Decoders/DataUriImageDecoder.php b/src/Drivers/Gd/Decoders/DataUriImageDecoder.php
index 450230b0..46ce5806 100644
--- a/src/Drivers/Gd/Decoders/DataUriImageDecoder.php
+++ b/src/Drivers/Gd/Decoders/DataUriImageDecoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Decoders;
 
 use Intervention\Image\Exceptions\DecoderException;
diff --git a/src/Drivers/Gd/Decoders/FilePathImageDecoder.php b/src/Drivers/Gd/Decoders/FilePathImageDecoder.php
index 2a46ba53..be0cbff0 100644
--- a/src/Drivers/Gd/Decoders/FilePathImageDecoder.php
+++ b/src/Drivers/Gd/Decoders/FilePathImageDecoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Decoders;
 
 use Exception;
diff --git a/src/Drivers/Gd/Decoders/FilePointerImageDecoder.php b/src/Drivers/Gd/Decoders/FilePointerImageDecoder.php
index 61ae42f5..66a39f01 100644
--- a/src/Drivers/Gd/Decoders/FilePointerImageDecoder.php
+++ b/src/Drivers/Gd/Decoders/FilePointerImageDecoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Decoders;
 
 use Intervention\Image\Exceptions\DecoderException;
diff --git a/src/Drivers/Gd/Decoders/ImageObjectDecoder.php b/src/Drivers/Gd/Decoders/ImageObjectDecoder.php
index 5ba2c40d..a761008c 100644
--- a/src/Drivers/Gd/Decoders/ImageObjectDecoder.php
+++ b/src/Drivers/Gd/Decoders/ImageObjectDecoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Decoders;
 
 use Intervention\Image\Drivers\AbstractDecoder;
diff --git a/src/Drivers/Gd/Decoders/SplFileInfoImageDecoder.php b/src/Drivers/Gd/Decoders/SplFileInfoImageDecoder.php
index 91d55f5a..26a470b2 100644
--- a/src/Drivers/Gd/Decoders/SplFileInfoImageDecoder.php
+++ b/src/Drivers/Gd/Decoders/SplFileInfoImageDecoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Decoders;
 
 use SplFileInfo;
diff --git a/src/Drivers/Gd/Driver.php b/src/Drivers/Gd/Driver.php
index 15296463..2c80ee40 100644
--- a/src/Drivers/Gd/Driver.php
+++ b/src/Drivers/Gd/Driver.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd;
 
 use Intervention\Image\Drivers\AbstractDriver;
diff --git a/src/Drivers/Gd/Encoders/AvifEncoder.php b/src/Drivers/Gd/Encoders/AvifEncoder.php
index 975fcbca..432e1cb0 100644
--- a/src/Drivers/Gd/Encoders/AvifEncoder.php
+++ b/src/Drivers/Gd/Encoders/AvifEncoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Encoders;
 
 use Intervention\Image\Drivers\DriverSpecializedEncoder;
diff --git a/src/Drivers/Gd/Encoders/BmpEncoder.php b/src/Drivers/Gd/Encoders/BmpEncoder.php
index d9481b9d..7d918afe 100644
--- a/src/Drivers/Gd/Encoders/BmpEncoder.php
+++ b/src/Drivers/Gd/Encoders/BmpEncoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Encoders;
 
 use Intervention\Image\Drivers\DriverSpecializedEncoder;
diff --git a/src/Drivers/Gd/Encoders/GifEncoder.php b/src/Drivers/Gd/Encoders/GifEncoder.php
index 294dd751..83e038e1 100644
--- a/src/Drivers/Gd/Encoders/GifEncoder.php
+++ b/src/Drivers/Gd/Encoders/GifEncoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Encoders;
 
 use Intervention\Gif\Builder as GifBuilder;
@@ -32,7 +34,7 @@ class GifEncoder extends DriverSpecializedEncoder
 
         foreach ($image as $frame) {
             $builder->addFrame(
-                $this->encode($frame->toImage($image->driver())),
+                (string) $this->encode($frame->toImage($image->driver())),
                 $frame->delay()
             );
         }
diff --git a/src/Drivers/Gd/Encoders/JpegEncoder.php b/src/Drivers/Gd/Encoders/JpegEncoder.php
index e9a456cb..d6436b83 100644
--- a/src/Drivers/Gd/Encoders/JpegEncoder.php
+++ b/src/Drivers/Gd/Encoders/JpegEncoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Encoders;
 
 use Intervention\Image\Drivers\DriverSpecializedEncoder;
diff --git a/src/Drivers/Gd/Encoders/PngEncoder.php b/src/Drivers/Gd/Encoders/PngEncoder.php
index 7a2ce862..1d7f2c2b 100644
--- a/src/Drivers/Gd/Encoders/PngEncoder.php
+++ b/src/Drivers/Gd/Encoders/PngEncoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Encoders;
 
 use Intervention\Image\Drivers\DriverSpecializedEncoder;
diff --git a/src/Drivers/Gd/Encoders/WebpEncoder.php b/src/Drivers/Gd/Encoders/WebpEncoder.php
index 1a590dbe..31416c36 100644
--- a/src/Drivers/Gd/Encoders/WebpEncoder.php
+++ b/src/Drivers/Gd/Encoders/WebpEncoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Encoders;
 
 use Intervention\Image\Drivers\DriverSpecializedEncoder;
diff --git a/src/Drivers/Gd/Frame.php b/src/Drivers/Gd/Frame.php
index 62f4ea17..4212ad41 100644
--- a/src/Drivers/Gd/Frame.php
+++ b/src/Drivers/Gd/Frame.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd;
 
 use GdImage;
diff --git a/src/Drivers/Gd/InputHandler.php b/src/Drivers/Gd/InputHandler.php
index 50a0e55f..35d1a637 100644
--- a/src/Drivers/Gd/InputHandler.php
+++ b/src/Drivers/Gd/InputHandler.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd;
 
 use Intervention\Image\Colors\Rgb\Decoders\HexColorDecoder as RgbHexColorDecoder;
diff --git a/src/Drivers/Gd/Modifiers/BlendTransparencyModifier.php b/src/Drivers/Gd/Modifiers/BlendTransparencyModifier.php
index 9abe4bdb..e547150d 100644
--- a/src/Drivers/Gd/Modifiers/BlendTransparencyModifier.php
+++ b/src/Drivers/Gd/Modifiers/BlendTransparencyModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Gd/Modifiers/BlurModifier.php b/src/Drivers/Gd/Modifiers/BlurModifier.php
index 557583ad..a51b0404 100644
--- a/src/Drivers/Gd/Modifiers/BlurModifier.php
+++ b/src/Drivers/Gd/Modifiers/BlurModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Gd/Modifiers/BrightnessModifier.php b/src/Drivers/Gd/Modifiers/BrightnessModifier.php
index 7ea8474e..7eab2769 100644
--- a/src/Drivers/Gd/Modifiers/BrightnessModifier.php
+++ b/src/Drivers/Gd/Modifiers/BrightnessModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Gd/Modifiers/ColorizeModifier.php b/src/Drivers/Gd/Modifiers/ColorizeModifier.php
index 536922d1..ed20e070 100644
--- a/src/Drivers/Gd/Modifiers/ColorizeModifier.php
+++ b/src/Drivers/Gd/Modifiers/ColorizeModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
@@ -16,9 +18,9 @@ class ColorizeModifier extends DriverSpecialized implements ModifierInterface
     public function apply(ImageInterface $image): ImageInterface
     {
         // normalize colorize levels
-        $red = round($this->red * 2.55);
-        $green = round($this->green * 2.55);
-        $blue = round($this->blue * 2.55);
+        $red = (int) round($this->red * 2.55);
+        $green = (int) round($this->green * 2.55);
+        $blue = (int) round($this->blue * 2.55);
 
         foreach ($image as $frame) {
             imagefilter($frame->native(), IMG_FILTER_COLORIZE, $red, $green, $blue);
diff --git a/src/Drivers/Gd/Modifiers/ColorspaceModifier.php b/src/Drivers/Gd/Modifiers/ColorspaceModifier.php
index 790afcec..3881860d 100644
--- a/src/Drivers/Gd/Modifiers/ColorspaceModifier.php
+++ b/src/Drivers/Gd/Modifiers/ColorspaceModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Colors\Rgb\Colorspace as RgbColorspace;
diff --git a/src/Drivers/Gd/Modifiers/ContainModifier.php b/src/Drivers/Gd/Modifiers/ContainModifier.php
index ef07828e..f404973e 100644
--- a/src/Drivers/Gd/Modifiers/ContainModifier.php
+++ b/src/Drivers/Gd/Modifiers/ContainModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Colors\Rgb\Channels\Blue;
diff --git a/src/Drivers/Gd/Modifiers/ContrastModifier.php b/src/Drivers/Gd/Modifiers/ContrastModifier.php
index d069f232..892964d6 100644
--- a/src/Drivers/Gd/Modifiers/ContrastModifier.php
+++ b/src/Drivers/Gd/Modifiers/ContrastModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Gd/Modifiers/CoverDownModifier.php b/src/Drivers/Gd/Modifiers/CoverDownModifier.php
index cec3b683..5fb71f08 100644
--- a/src/Drivers/Gd/Modifiers/CoverDownModifier.php
+++ b/src/Drivers/Gd/Modifiers/CoverDownModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Interfaces\SizeInterface;
diff --git a/src/Drivers/Gd/Modifiers/CoverModifier.php b/src/Drivers/Gd/Modifiers/CoverModifier.php
index d149d393..c6004ea5 100644
--- a/src/Drivers/Gd/Modifiers/CoverModifier.php
+++ b/src/Drivers/Gd/Modifiers/CoverModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Gd/Modifiers/CropModifier.php b/src/Drivers/Gd/Modifiers/CropModifier.php
index 65588c35..aa82fd6e 100644
--- a/src/Drivers/Gd/Modifiers/CropModifier.php
+++ b/src/Drivers/Gd/Modifiers/CropModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Gd/Modifiers/DrawEllipseModifier.php b/src/Drivers/Gd/Modifiers/DrawEllipseModifier.php
index 801ed764..c988fd8f 100644
--- a/src/Drivers/Gd/Modifiers/DrawEllipseModifier.php
+++ b/src/Drivers/Gd/Modifiers/DrawEllipseModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Drivers\AbstractDrawModifier;
diff --git a/src/Drivers/Gd/Modifiers/DrawLineModifier.php b/src/Drivers/Gd/Modifiers/DrawLineModifier.php
index fe49ca7b..2fb88fde 100644
--- a/src/Drivers/Gd/Modifiers/DrawLineModifier.php
+++ b/src/Drivers/Gd/Modifiers/DrawLineModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Drivers\AbstractDrawModifier;
diff --git a/src/Drivers/Gd/Modifiers/DrawPixelModifier.php b/src/Drivers/Gd/Modifiers/DrawPixelModifier.php
index 319f7ace..3c1b55b1 100644
--- a/src/Drivers/Gd/Modifiers/DrawPixelModifier.php
+++ b/src/Drivers/Gd/Modifiers/DrawPixelModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Gd/Modifiers/DrawPolygonModifier.php b/src/Drivers/Gd/Modifiers/DrawPolygonModifier.php
index 83506611..02dd0acf 100644
--- a/src/Drivers/Gd/Modifiers/DrawPolygonModifier.php
+++ b/src/Drivers/Gd/Modifiers/DrawPolygonModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Drivers\AbstractDrawModifier;
diff --git a/src/Drivers/Gd/Modifiers/DrawRectangleModifier.php b/src/Drivers/Gd/Modifiers/DrawRectangleModifier.php
index 0df6d144..17e19aad 100644
--- a/src/Drivers/Gd/Modifiers/DrawRectangleModifier.php
+++ b/src/Drivers/Gd/Modifiers/DrawRectangleModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Drivers\AbstractDrawModifier;
diff --git a/src/Drivers/Gd/Modifiers/FillModifier.php b/src/Drivers/Gd/Modifiers/FillModifier.php
index 59488ae9..00265248 100644
--- a/src/Drivers/Gd/Modifiers/FillModifier.php
+++ b/src/Drivers/Gd/Modifiers/FillModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Gd/Modifiers/FlipModifier.php b/src/Drivers/Gd/Modifiers/FlipModifier.php
index c0f45b28..ad588863 100644
--- a/src/Drivers/Gd/Modifiers/FlipModifier.php
+++ b/src/Drivers/Gd/Modifiers/FlipModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Gd/Modifiers/FlopModifier.php b/src/Drivers/Gd/Modifiers/FlopModifier.php
index 00cb322d..55fcc95b 100644
--- a/src/Drivers/Gd/Modifiers/FlopModifier.php
+++ b/src/Drivers/Gd/Modifiers/FlopModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Gd/Modifiers/GammaModifier.php b/src/Drivers/Gd/Modifiers/GammaModifier.php
index 372d0ed2..ef369d6f 100644
--- a/src/Drivers/Gd/Modifiers/GammaModifier.php
+++ b/src/Drivers/Gd/Modifiers/GammaModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Gd/Modifiers/GreyscaleModifier.php b/src/Drivers/Gd/Modifiers/GreyscaleModifier.php
index b31d052d..62babe2b 100644
--- a/src/Drivers/Gd/Modifiers/GreyscaleModifier.php
+++ b/src/Drivers/Gd/Modifiers/GreyscaleModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Gd/Modifiers/InvertModifier.php b/src/Drivers/Gd/Modifiers/InvertModifier.php
index 8f8a353b..df115129 100644
--- a/src/Drivers/Gd/Modifiers/InvertModifier.php
+++ b/src/Drivers/Gd/Modifiers/InvertModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Gd/Modifiers/PadModifier.php b/src/Drivers/Gd/Modifiers/PadModifier.php
index 7559d948..73e11b4a 100644
--- a/src/Drivers/Gd/Modifiers/PadModifier.php
+++ b/src/Drivers/Gd/Modifiers/PadModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 class PadModifier extends ContainModifier
diff --git a/src/Drivers/Gd/Modifiers/PixelateModifier.php b/src/Drivers/Gd/Modifiers/PixelateModifier.php
index 29fac83e..023fde24 100644
--- a/src/Drivers/Gd/Modifiers/PixelateModifier.php
+++ b/src/Drivers/Gd/Modifiers/PixelateModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Gd/Modifiers/PlaceModifier.php b/src/Drivers/Gd/Modifiers/PlaceModifier.php
index 7376693b..2b809fea 100644
--- a/src/Drivers/Gd/Modifiers/PlaceModifier.php
+++ b/src/Drivers/Gd/Modifiers/PlaceModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Gd/Modifiers/ProfileModifier.php b/src/Drivers/Gd/Modifiers/ProfileModifier.php
index caa5bcd4..adf01642 100644
--- a/src/Drivers/Gd/Modifiers/ProfileModifier.php
+++ b/src/Drivers/Gd/Modifiers/ProfileModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Gd/Modifiers/ProfileRemovalModifier.php b/src/Drivers/Gd/Modifiers/ProfileRemovalModifier.php
index 00da90da..7f95d0f9 100644
--- a/src/Drivers/Gd/Modifiers/ProfileRemovalModifier.php
+++ b/src/Drivers/Gd/Modifiers/ProfileRemovalModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Gd/Modifiers/QuantizeColorsModifier.php b/src/Drivers/Gd/Modifiers/QuantizeColorsModifier.php
index 6d949e51..9db2d3f0 100644
--- a/src/Drivers/Gd/Modifiers/QuantizeColorsModifier.php
+++ b/src/Drivers/Gd/Modifiers/QuantizeColorsModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Gd/Modifiers/RemoveAnimationModifier.php b/src/Drivers/Gd/Modifiers/RemoveAnimationModifier.php
index 1ac85d33..7d050945 100644
--- a/src/Drivers/Gd/Modifiers/RemoveAnimationModifier.php
+++ b/src/Drivers/Gd/Modifiers/RemoveAnimationModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Gd/Modifiers/ResizeCanvasModifier.php b/src/Drivers/Gd/Modifiers/ResizeCanvasModifier.php
index 59e8de2a..5536da55 100644
--- a/src/Drivers/Gd/Modifiers/ResizeCanvasModifier.php
+++ b/src/Drivers/Gd/Modifiers/ResizeCanvasModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Colors\Rgb\Channels\Blue;
diff --git a/src/Drivers/Gd/Modifiers/ResizeCanvasRelativeModifier.php b/src/Drivers/Gd/Modifiers/ResizeCanvasRelativeModifier.php
index 4269d566..13d2e89d 100644
--- a/src/Drivers/Gd/Modifiers/ResizeCanvasRelativeModifier.php
+++ b/src/Drivers/Gd/Modifiers/ResizeCanvasRelativeModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Interfaces\ImageInterface;
diff --git a/src/Drivers/Gd/Modifiers/ResizeDownModifier.php b/src/Drivers/Gd/Modifiers/ResizeDownModifier.php
index 33aa9598..6ce08fd8 100644
--- a/src/Drivers/Gd/Modifiers/ResizeDownModifier.php
+++ b/src/Drivers/Gd/Modifiers/ResizeDownModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Interfaces\ImageInterface;
diff --git a/src/Drivers/Gd/Modifiers/ResizeModifier.php b/src/Drivers/Gd/Modifiers/ResizeModifier.php
index c7d447dd..dce97a31 100644
--- a/src/Drivers/Gd/Modifiers/ResizeModifier.php
+++ b/src/Drivers/Gd/Modifiers/ResizeModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Gd/Modifiers/ResolutionModifier.php b/src/Drivers/Gd/Modifiers/ResolutionModifier.php
index e594e2be..9293b915 100644
--- a/src/Drivers/Gd/Modifiers/ResolutionModifier.php
+++ b/src/Drivers/Gd/Modifiers/ResolutionModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Gd/Modifiers/RotateModifier.php b/src/Drivers/Gd/Modifiers/RotateModifier.php
index e7a94d63..7e8019ea 100644
--- a/src/Drivers/Gd/Modifiers/RotateModifier.php
+++ b/src/Drivers/Gd/Modifiers/RotateModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Colors\Rgb\Channels\Blue;
diff --git a/src/Drivers/Gd/Modifiers/ScaleDownModifier.php b/src/Drivers/Gd/Modifiers/ScaleDownModifier.php
index 53f19929..483839d6 100644
--- a/src/Drivers/Gd/Modifiers/ScaleDownModifier.php
+++ b/src/Drivers/Gd/Modifiers/ScaleDownModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Interfaces\ImageInterface;
diff --git a/src/Drivers/Gd/Modifiers/ScaleModifier.php b/src/Drivers/Gd/Modifiers/ScaleModifier.php
index ef00d6a6..feb3dba8 100644
--- a/src/Drivers/Gd/Modifiers/ScaleModifier.php
+++ b/src/Drivers/Gd/Modifiers/ScaleModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Interfaces\ImageInterface;
diff --git a/src/Drivers/Gd/Modifiers/SharpenModifier.php b/src/Drivers/Gd/Modifiers/SharpenModifier.php
index 92d74021..58f5b5c9 100644
--- a/src/Drivers/Gd/Modifiers/SharpenModifier.php
+++ b/src/Drivers/Gd/Modifiers/SharpenModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Gd/Modifiers/SliceAnimationModifier.php b/src/Drivers/Gd/Modifiers/SliceAnimationModifier.php
index ddb9f18f..edc7346f 100644
--- a/src/Drivers/Gd/Modifiers/SliceAnimationModifier.php
+++ b/src/Drivers/Gd/Modifiers/SliceAnimationModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Gd/Modifiers/TextModifier.php b/src/Drivers/Gd/Modifiers/TextModifier.php
index 3951c319..d1e0709d 100644
--- a/src/Drivers/Gd/Modifiers/TextModifier.php
+++ b/src/Drivers/Gd/Modifiers/TextModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Drivers\AbstractTextModifier;
@@ -46,7 +48,7 @@ class TextModifier extends AbstractTextModifier
                         $this->getGdFont(),
                         $line->position()->x(),
                         $line->position()->y(),
-                        $line,
+                        (string) $line,
                         $color
                     );
                 }
diff --git a/src/Drivers/Imagick/Analyzers/ColorspaceAnalyzer.php b/src/Drivers/Imagick/Analyzers/ColorspaceAnalyzer.php
index f1aef4b1..6bebc99f 100644
--- a/src/Drivers/Imagick/Analyzers/ColorspaceAnalyzer.php
+++ b/src/Drivers/Imagick/Analyzers/ColorspaceAnalyzer.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Analyzers;
 
 use Imagick;
diff --git a/src/Drivers/Imagick/Analyzers/HeightAnalyzer.php b/src/Drivers/Imagick/Analyzers/HeightAnalyzer.php
index 2eaf7362..6dee9d41 100644
--- a/src/Drivers/Imagick/Analyzers/HeightAnalyzer.php
+++ b/src/Drivers/Imagick/Analyzers/HeightAnalyzer.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Analyzers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Imagick/Analyzers/PixelColorAnalyzer.php b/src/Drivers/Imagick/Analyzers/PixelColorAnalyzer.php
index b8cfb1df..f7825ae2 100644
--- a/src/Drivers/Imagick/Analyzers/PixelColorAnalyzer.php
+++ b/src/Drivers/Imagick/Analyzers/PixelColorAnalyzer.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Analyzers;
 
 use Imagick;
diff --git a/src/Drivers/Imagick/Analyzers/PixelColorsAnalyzer.php b/src/Drivers/Imagick/Analyzers/PixelColorsAnalyzer.php
index 65b71a5f..5f64a4f4 100644
--- a/src/Drivers/Imagick/Analyzers/PixelColorsAnalyzer.php
+++ b/src/Drivers/Imagick/Analyzers/PixelColorsAnalyzer.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Analyzers;
 
 use Intervention\Image\Collection;
diff --git a/src/Drivers/Imagick/Analyzers/ProfileAnalyzer.php b/src/Drivers/Imagick/Analyzers/ProfileAnalyzer.php
index 6518c180..8208d4cc 100644
--- a/src/Drivers/Imagick/Analyzers/ProfileAnalyzer.php
+++ b/src/Drivers/Imagick/Analyzers/ProfileAnalyzer.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Analyzers;
 
 use Intervention\Image\Colors\Profile;
diff --git a/src/Drivers/Imagick/Analyzers/ResolutionAnalyzer.php b/src/Drivers/Imagick/Analyzers/ResolutionAnalyzer.php
index 6ef5f13d..ba502002 100644
--- a/src/Drivers/Imagick/Analyzers/ResolutionAnalyzer.php
+++ b/src/Drivers/Imagick/Analyzers/ResolutionAnalyzer.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Analyzers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Imagick/Analyzers/WidthAnalyzer.php b/src/Drivers/Imagick/Analyzers/WidthAnalyzer.php
index 27d3d657..328d70e1 100644
--- a/src/Drivers/Imagick/Analyzers/WidthAnalyzer.php
+++ b/src/Drivers/Imagick/Analyzers/WidthAnalyzer.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Analyzers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Imagick/ColorProcessor.php b/src/Drivers/Imagick/ColorProcessor.php
index fba6f38e..75a6be83 100644
--- a/src/Drivers/Imagick/ColorProcessor.php
+++ b/src/Drivers/Imagick/ColorProcessor.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick;
 
 use Imagick;
diff --git a/src/Drivers/Imagick/Core.php b/src/Drivers/Imagick/Core.php
index 1b270618..05a6ff0a 100644
--- a/src/Drivers/Imagick/Core.php
+++ b/src/Drivers/Imagick/Core.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick;
 
 use Imagick;
@@ -130,7 +132,10 @@ class Core implements CoreInterface, Iterator
     {
         $imagick = $frame->native();
 
-        $imagick->setImageDelay($frame->delay());
+        $imagick->setImageDelay(
+            (int) round($frame->delay() * 100)
+        );
+
         $imagick->setImageDispose($frame->dispose());
 
         $size = $frame->size();
diff --git a/src/Drivers/Imagick/Decoders/Base64ImageDecoder.php b/src/Drivers/Imagick/Decoders/Base64ImageDecoder.php
index 4f9ace41..1d788ab3 100644
--- a/src/Drivers/Imagick/Decoders/Base64ImageDecoder.php
+++ b/src/Drivers/Imagick/Decoders/Base64ImageDecoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Decoders;
 
 use Intervention\Image\Exceptions\DecoderException;
diff --git a/src/Drivers/Imagick/Decoders/BinaryImageDecoder.php b/src/Drivers/Imagick/Decoders/BinaryImageDecoder.php
index 0044ee47..07679e5d 100644
--- a/src/Drivers/Imagick/Decoders/BinaryImageDecoder.php
+++ b/src/Drivers/Imagick/Decoders/BinaryImageDecoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Decoders;
 
 use Imagick;
diff --git a/src/Drivers/Imagick/Decoders/ColorObjectDecoder.php b/src/Drivers/Imagick/Decoders/ColorObjectDecoder.php
index 9928404f..47c4bac2 100644
--- a/src/Drivers/Imagick/Decoders/ColorObjectDecoder.php
+++ b/src/Drivers/Imagick/Decoders/ColorObjectDecoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Decoders;
 
 use Intervention\Image\Drivers\AbstractDecoder;
diff --git a/src/Drivers/Imagick/Decoders/DataUriImageDecoder.php b/src/Drivers/Imagick/Decoders/DataUriImageDecoder.php
index e581c9a3..16f79444 100644
--- a/src/Drivers/Imagick/Decoders/DataUriImageDecoder.php
+++ b/src/Drivers/Imagick/Decoders/DataUriImageDecoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Decoders;
 
 use Intervention\Image\Exceptions\DecoderException;
diff --git a/src/Drivers/Imagick/Decoders/FilePathImageDecoder.php b/src/Drivers/Imagick/Decoders/FilePathImageDecoder.php
index 7a728dc4..687a2375 100644
--- a/src/Drivers/Imagick/Decoders/FilePathImageDecoder.php
+++ b/src/Drivers/Imagick/Decoders/FilePathImageDecoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Decoders;
 
 use Exception;
diff --git a/src/Drivers/Imagick/Decoders/FilePointerImageDecoder.php b/src/Drivers/Imagick/Decoders/FilePointerImageDecoder.php
index 92517178..3145a2b7 100644
--- a/src/Drivers/Imagick/Decoders/FilePointerImageDecoder.php
+++ b/src/Drivers/Imagick/Decoders/FilePointerImageDecoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Decoders;
 
 use Intervention\Image\Exceptions\DecoderException;
diff --git a/src/Drivers/Imagick/Decoders/ImageObjectDecoder.php b/src/Drivers/Imagick/Decoders/ImageObjectDecoder.php
index 311bc852..0ea0fb14 100644
--- a/src/Drivers/Imagick/Decoders/ImageObjectDecoder.php
+++ b/src/Drivers/Imagick/Decoders/ImageObjectDecoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Decoders;
 
 use Intervention\Image\Drivers\AbstractDecoder;
diff --git a/src/Drivers/Imagick/Decoders/SplFileInfoImageDecoder.php b/src/Drivers/Imagick/Decoders/SplFileInfoImageDecoder.php
index 72cfca3e..0210894f 100644
--- a/src/Drivers/Imagick/Decoders/SplFileInfoImageDecoder.php
+++ b/src/Drivers/Imagick/Decoders/SplFileInfoImageDecoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Decoders;
 
 use SplFileInfo;
diff --git a/src/Drivers/Imagick/Driver.php b/src/Drivers/Imagick/Driver.php
index 4c0a412c..baa154fd 100644
--- a/src/Drivers/Imagick/Driver.php
+++ b/src/Drivers/Imagick/Driver.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick;
 
 use Imagick;
@@ -81,7 +83,7 @@ class Driver extends AbstractDriver
             public function add($source, float $delay = 1): self
             {
                 $native = $this->driver->handleInput($source)->core()->native();
-                $native->setImageDelay($delay * 100);
+                $native->setImageDelay(intval(round($delay * 100)));
 
                 $this->imagick->addImage($native);
 
diff --git a/src/Drivers/Imagick/Encoders/AvifEncoder.php b/src/Drivers/Imagick/Encoders/AvifEncoder.php
index e3e574fd..3b65b12a 100644
--- a/src/Drivers/Imagick/Encoders/AvifEncoder.php
+++ b/src/Drivers/Imagick/Encoders/AvifEncoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Encoders;
 
 use Imagick;
diff --git a/src/Drivers/Imagick/Encoders/BmpEncoder.php b/src/Drivers/Imagick/Encoders/BmpEncoder.php
index e07056bb..e62b290f 100644
--- a/src/Drivers/Imagick/Encoders/BmpEncoder.php
+++ b/src/Drivers/Imagick/Encoders/BmpEncoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Encoders;
 
 use Imagick;
diff --git a/src/Drivers/Imagick/Encoders/GifEncoder.php b/src/Drivers/Imagick/Encoders/GifEncoder.php
index b302b5bf..282cb17e 100644
--- a/src/Drivers/Imagick/Encoders/GifEncoder.php
+++ b/src/Drivers/Imagick/Encoders/GifEncoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Encoders;
 
 use Imagick;
diff --git a/src/Drivers/Imagick/Encoders/HeicEncoder.php b/src/Drivers/Imagick/Encoders/HeicEncoder.php
index 5c5ef82d..252ca365 100644
--- a/src/Drivers/Imagick/Encoders/HeicEncoder.php
+++ b/src/Drivers/Imagick/Encoders/HeicEncoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Encoders;
 
 use Intervention\Image\Drivers\DriverSpecializedEncoder;
diff --git a/src/Drivers/Imagick/Encoders/Jpeg2000Encoder.php b/src/Drivers/Imagick/Encoders/Jpeg2000Encoder.php
index 1ff0a95a..8276408c 100644
--- a/src/Drivers/Imagick/Encoders/Jpeg2000Encoder.php
+++ b/src/Drivers/Imagick/Encoders/Jpeg2000Encoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Encoders;
 
 use Imagick;
diff --git a/src/Drivers/Imagick/Encoders/JpegEncoder.php b/src/Drivers/Imagick/Encoders/JpegEncoder.php
index acedb9f6..28ed4dd2 100644
--- a/src/Drivers/Imagick/Encoders/JpegEncoder.php
+++ b/src/Drivers/Imagick/Encoders/JpegEncoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Encoders;
 
 use Imagick;
diff --git a/src/Drivers/Imagick/Encoders/PngEncoder.php b/src/Drivers/Imagick/Encoders/PngEncoder.php
index 23060ff9..9732a38a 100644
--- a/src/Drivers/Imagick/Encoders/PngEncoder.php
+++ b/src/Drivers/Imagick/Encoders/PngEncoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Encoders;
 
 use Imagick;
diff --git a/src/Drivers/Imagick/Encoders/TiffEncoder.php b/src/Drivers/Imagick/Encoders/TiffEncoder.php
index 7b1f7449..6157e2d2 100644
--- a/src/Drivers/Imagick/Encoders/TiffEncoder.php
+++ b/src/Drivers/Imagick/Encoders/TiffEncoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Encoders;
 
 use Intervention\Image\Drivers\DriverSpecializedEncoder;
diff --git a/src/Drivers/Imagick/Encoders/WebpEncoder.php b/src/Drivers/Imagick/Encoders/WebpEncoder.php
index 12d81de2..cb20d739 100644
--- a/src/Drivers/Imagick/Encoders/WebpEncoder.php
+++ b/src/Drivers/Imagick/Encoders/WebpEncoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Encoders;
 
 use Imagick;
diff --git a/src/Drivers/Imagick/Frame.php b/src/Drivers/Imagick/Frame.php
index 342169b9..2439c855 100644
--- a/src/Drivers/Imagick/Frame.php
+++ b/src/Drivers/Imagick/Frame.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick;
 
 use Imagick;
diff --git a/src/Drivers/Imagick/InputHandler.php b/src/Drivers/Imagick/InputHandler.php
index 621585a1..43dc287b 100644
--- a/src/Drivers/Imagick/InputHandler.php
+++ b/src/Drivers/Imagick/InputHandler.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick;
 
 use Intervention\Image\Colors\Rgb\Decoders\HexColorDecoder as RgbHexColorDecoder;
diff --git a/src/Drivers/Imagick/Modifiers/BlendTransparencyModifier.php b/src/Drivers/Imagick/Modifiers/BlendTransparencyModifier.php
index a37b534f..6e342f51 100644
--- a/src/Drivers/Imagick/Modifiers/BlendTransparencyModifier.php
+++ b/src/Drivers/Imagick/Modifiers/BlendTransparencyModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use Imagick;
diff --git a/src/Drivers/Imagick/Modifiers/BlurModifier.php b/src/Drivers/Imagick/Modifiers/BlurModifier.php
index 155d5b2b..a8464e8f 100644
--- a/src/Drivers/Imagick/Modifiers/BlurModifier.php
+++ b/src/Drivers/Imagick/Modifiers/BlurModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Imagick/Modifiers/BrightnessModifier.php b/src/Drivers/Imagick/Modifiers/BrightnessModifier.php
index ddf20be3..ae24f6b8 100644
--- a/src/Drivers/Imagick/Modifiers/BrightnessModifier.php
+++ b/src/Drivers/Imagick/Modifiers/BrightnessModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Imagick/Modifiers/ColorizeModifier.php b/src/Drivers/Imagick/Modifiers/ColorizeModifier.php
index acfc3576..67f7c00c 100644
--- a/src/Drivers/Imagick/Modifiers/ColorizeModifier.php
+++ b/src/Drivers/Imagick/Modifiers/ColorizeModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use Imagick;
diff --git a/src/Drivers/Imagick/Modifiers/ColorspaceModifier.php b/src/Drivers/Imagick/Modifiers/ColorspaceModifier.php
index f1b83226..fb2d0279 100644
--- a/src/Drivers/Imagick/Modifiers/ColorspaceModifier.php
+++ b/src/Drivers/Imagick/Modifiers/ColorspaceModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use Imagick;
diff --git a/src/Drivers/Imagick/Modifiers/ContainModifier.php b/src/Drivers/Imagick/Modifiers/ContainModifier.php
index d80445ee..0823bdb2 100644
--- a/src/Drivers/Imagick/Modifiers/ContainModifier.php
+++ b/src/Drivers/Imagick/Modifiers/ContainModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use ImagickDraw;
diff --git a/src/Drivers/Imagick/Modifiers/ContrastModifier.php b/src/Drivers/Imagick/Modifiers/ContrastModifier.php
index 17a0a6e2..555c4555 100644
--- a/src/Drivers/Imagick/Modifiers/ContrastModifier.php
+++ b/src/Drivers/Imagick/Modifiers/ContrastModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Imagick/Modifiers/CoverDownModifier.php b/src/Drivers/Imagick/Modifiers/CoverDownModifier.php
index 5cbb9338..1312647f 100644
--- a/src/Drivers/Imagick/Modifiers/CoverDownModifier.php
+++ b/src/Drivers/Imagick/Modifiers/CoverDownModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Interfaces\SizeInterface;
diff --git a/src/Drivers/Imagick/Modifiers/CoverModifier.php b/src/Drivers/Imagick/Modifiers/CoverModifier.php
index e484681e..c5fef3f2 100644
--- a/src/Drivers/Imagick/Modifiers/CoverModifier.php
+++ b/src/Drivers/Imagick/Modifiers/CoverModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Imagick/Modifiers/CropModifier.php b/src/Drivers/Imagick/Modifiers/CropModifier.php
index a2e24159..52cb83d3 100644
--- a/src/Drivers/Imagick/Modifiers/CropModifier.php
+++ b/src/Drivers/Imagick/Modifiers/CropModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use ImagickDraw;
diff --git a/src/Drivers/Imagick/Modifiers/DrawEllipseModifier.php b/src/Drivers/Imagick/Modifiers/DrawEllipseModifier.php
index aa435af6..ceaf714b 100644
--- a/src/Drivers/Imagick/Modifiers/DrawEllipseModifier.php
+++ b/src/Drivers/Imagick/Modifiers/DrawEllipseModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use ImagickDraw;
diff --git a/src/Drivers/Imagick/Modifiers/DrawLineModifier.php b/src/Drivers/Imagick/Modifiers/DrawLineModifier.php
index 997014b3..b65eaa50 100644
--- a/src/Drivers/Imagick/Modifiers/DrawLineModifier.php
+++ b/src/Drivers/Imagick/Modifiers/DrawLineModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use ImagickDraw;
diff --git a/src/Drivers/Imagick/Modifiers/DrawPixelModifier.php b/src/Drivers/Imagick/Modifiers/DrawPixelModifier.php
index f4689aef..91c1954c 100644
--- a/src/Drivers/Imagick/Modifiers/DrawPixelModifier.php
+++ b/src/Drivers/Imagick/Modifiers/DrawPixelModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use ImagickDraw;
diff --git a/src/Drivers/Imagick/Modifiers/DrawPolygonModifier.php b/src/Drivers/Imagick/Modifiers/DrawPolygonModifier.php
index b76cda94..30648ed3 100644
--- a/src/Drivers/Imagick/Modifiers/DrawPolygonModifier.php
+++ b/src/Drivers/Imagick/Modifiers/DrawPolygonModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use ImagickDraw;
diff --git a/src/Drivers/Imagick/Modifiers/DrawRectangleModifier.php b/src/Drivers/Imagick/Modifiers/DrawRectangleModifier.php
index afa573ea..b0b8aee5 100644
--- a/src/Drivers/Imagick/Modifiers/DrawRectangleModifier.php
+++ b/src/Drivers/Imagick/Modifiers/DrawRectangleModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use ImagickDraw;
diff --git a/src/Drivers/Imagick/Modifiers/FillModifier.php b/src/Drivers/Imagick/Modifiers/FillModifier.php
index 8c9354ae..141b8f3c 100644
--- a/src/Drivers/Imagick/Modifiers/FillModifier.php
+++ b/src/Drivers/Imagick/Modifiers/FillModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use Imagick;
diff --git a/src/Drivers/Imagick/Modifiers/FlipModifier.php b/src/Drivers/Imagick/Modifiers/FlipModifier.php
index 0f8d568c..442db543 100644
--- a/src/Drivers/Imagick/Modifiers/FlipModifier.php
+++ b/src/Drivers/Imagick/Modifiers/FlipModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Imagick/Modifiers/FlopModifier.php b/src/Drivers/Imagick/Modifiers/FlopModifier.php
index 0df097ec..d99f8a19 100644
--- a/src/Drivers/Imagick/Modifiers/FlopModifier.php
+++ b/src/Drivers/Imagick/Modifiers/FlopModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Imagick/Modifiers/GammaModifier.php b/src/Drivers/Imagick/Modifiers/GammaModifier.php
index 8edef4a6..bf6ca948 100644
--- a/src/Drivers/Imagick/Modifiers/GammaModifier.php
+++ b/src/Drivers/Imagick/Modifiers/GammaModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Imagick/Modifiers/GreyscaleModifier.php b/src/Drivers/Imagick/Modifiers/GreyscaleModifier.php
index db2762c8..2e32c45a 100644
--- a/src/Drivers/Imagick/Modifiers/GreyscaleModifier.php
+++ b/src/Drivers/Imagick/Modifiers/GreyscaleModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Imagick/Modifiers/InvertModifier.php b/src/Drivers/Imagick/Modifiers/InvertModifier.php
index 26b476b8..b3f877e7 100644
--- a/src/Drivers/Imagick/Modifiers/InvertModifier.php
+++ b/src/Drivers/Imagick/Modifiers/InvertModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Imagick/Modifiers/PadModifier.php b/src/Drivers/Imagick/Modifiers/PadModifier.php
index 578ec10b..d924ae16 100644
--- a/src/Drivers/Imagick/Modifiers/PadModifier.php
+++ b/src/Drivers/Imagick/Modifiers/PadModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 class PadModifier extends ContainModifier
diff --git a/src/Drivers/Imagick/Modifiers/PixelateModifier.php b/src/Drivers/Imagick/Modifiers/PixelateModifier.php
index a5a8ee20..39a73d96 100644
--- a/src/Drivers/Imagick/Modifiers/PixelateModifier.php
+++ b/src/Drivers/Imagick/Modifiers/PixelateModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
@@ -26,8 +28,8 @@ class PixelateModifier extends DriverSpecialized implements ModifierInterface
         $size = $frame->size();
 
         $frame->native()->scaleImage(
-            round(max(1, ($size->width() / $this->size))),
-            round(max(1, ($size->height() / $this->size)))
+            (int) round(max(1, ($size->width() / $this->size))),
+            (int) round(max(1, ($size->height() / $this->size)))
         );
 
         $frame->native()->scaleImage($size->width(), $size->height());
diff --git a/src/Drivers/Imagick/Modifiers/PlaceModifier.php b/src/Drivers/Imagick/Modifiers/PlaceModifier.php
index 6f2f164e..6851ef6e 100644
--- a/src/Drivers/Imagick/Modifiers/PlaceModifier.php
+++ b/src/Drivers/Imagick/Modifiers/PlaceModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use Imagick;
diff --git a/src/Drivers/Imagick/Modifiers/ProfileModifier.php b/src/Drivers/Imagick/Modifiers/ProfileModifier.php
index 33ff0524..fb646558 100644
--- a/src/Drivers/Imagick/Modifiers/ProfileModifier.php
+++ b/src/Drivers/Imagick/Modifiers/ProfileModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Imagick/Modifiers/ProfileRemovalModifier.php b/src/Drivers/Imagick/Modifiers/ProfileRemovalModifier.php
index 9e905f33..e300810a 100644
--- a/src/Drivers/Imagick/Modifiers/ProfileRemovalModifier.php
+++ b/src/Drivers/Imagick/Modifiers/ProfileRemovalModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Imagick/Modifiers/QuantizeColorsModifier.php b/src/Drivers/Imagick/Modifiers/QuantizeColorsModifier.php
index 3d68023c..486288da 100644
--- a/src/Drivers/Imagick/Modifiers/QuantizeColorsModifier.php
+++ b/src/Drivers/Imagick/Modifiers/QuantizeColorsModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Imagick/Modifiers/RemoveAnimationModifier.php b/src/Drivers/Imagick/Modifiers/RemoveAnimationModifier.php
index b4f3e71e..1b9579c3 100644
--- a/src/Drivers/Imagick/Modifiers/RemoveAnimationModifier.php
+++ b/src/Drivers/Imagick/Modifiers/RemoveAnimationModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use Imagick;
diff --git a/src/Drivers/Imagick/Modifiers/ResizeCanvasModifier.php b/src/Drivers/Imagick/Modifiers/ResizeCanvasModifier.php
index 518c8856..945bb13b 100644
--- a/src/Drivers/Imagick/Modifiers/ResizeCanvasModifier.php
+++ b/src/Drivers/Imagick/Modifiers/ResizeCanvasModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use ImagickDraw;
diff --git a/src/Drivers/Imagick/Modifiers/ResizeCanvasRelativeModifier.php b/src/Drivers/Imagick/Modifiers/ResizeCanvasRelativeModifier.php
index fe42d704..bb8a2a4d 100644
--- a/src/Drivers/Imagick/Modifiers/ResizeCanvasRelativeModifier.php
+++ b/src/Drivers/Imagick/Modifiers/ResizeCanvasRelativeModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Interfaces\ImageInterface;
diff --git a/src/Drivers/Imagick/Modifiers/ResizeDownModifier.php b/src/Drivers/Imagick/Modifiers/ResizeDownModifier.php
index 48c11e88..e08dc2fb 100644
--- a/src/Drivers/Imagick/Modifiers/ResizeDownModifier.php
+++ b/src/Drivers/Imagick/Modifiers/ResizeDownModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Interfaces\ImageInterface;
diff --git a/src/Drivers/Imagick/Modifiers/ResizeModifier.php b/src/Drivers/Imagick/Modifiers/ResizeModifier.php
index 9d0895a4..457012f6 100644
--- a/src/Drivers/Imagick/Modifiers/ResizeModifier.php
+++ b/src/Drivers/Imagick/Modifiers/ResizeModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Imagick/Modifiers/ResolutionModifier.php b/src/Drivers/Imagick/Modifiers/ResolutionModifier.php
index 7b1d53cc..dcb711f1 100644
--- a/src/Drivers/Imagick/Modifiers/ResolutionModifier.php
+++ b/src/Drivers/Imagick/Modifiers/ResolutionModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Imagick/Modifiers/RotateModifier.php b/src/Drivers/Imagick/Modifiers/RotateModifier.php
index 22b65e49..9ce82b44 100644
--- a/src/Drivers/Imagick/Modifiers/RotateModifier.php
+++ b/src/Drivers/Imagick/Modifiers/RotateModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Imagick/Modifiers/ScaleDownModifier.php b/src/Drivers/Imagick/Modifiers/ScaleDownModifier.php
index b4ce6945..5e1a9b35 100644
--- a/src/Drivers/Imagick/Modifiers/ScaleDownModifier.php
+++ b/src/Drivers/Imagick/Modifiers/ScaleDownModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Interfaces\ImageInterface;
diff --git a/src/Drivers/Imagick/Modifiers/ScaleModifier.php b/src/Drivers/Imagick/Modifiers/ScaleModifier.php
index 9a85b1fb..6aaf9726 100644
--- a/src/Drivers/Imagick/Modifiers/ScaleModifier.php
+++ b/src/Drivers/Imagick/Modifiers/ScaleModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Interfaces\ImageInterface;
diff --git a/src/Drivers/Imagick/Modifiers/SharpenModifier.php b/src/Drivers/Imagick/Modifiers/SharpenModifier.php
index cc71e5f6..4e105731 100644
--- a/src/Drivers/Imagick/Modifiers/SharpenModifier.php
+++ b/src/Drivers/Imagick/Modifiers/SharpenModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Imagick/Modifiers/SliceAnimationModifier.php b/src/Drivers/Imagick/Modifiers/SliceAnimationModifier.php
index ff8629ba..91996146 100644
--- a/src/Drivers/Imagick/Modifiers/SliceAnimationModifier.php
+++ b/src/Drivers/Imagick/Modifiers/SliceAnimationModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Drivers\DriverSpecialized;
diff --git a/src/Drivers/Imagick/Modifiers/TextModifier.php b/src/Drivers/Imagick/Modifiers/TextModifier.php
index 068d1391..30d44396 100644
--- a/src/Drivers/Imagick/Modifiers/TextModifier.php
+++ b/src/Drivers/Imagick/Modifiers/TextModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Drivers\Imagick\Modifiers;
 
 use Imagick;
diff --git a/src/EncodedImage.php b/src/EncodedImage.php
index c0f9fe65..4092f732 100644
--- a/src/EncodedImage.php
+++ b/src/EncodedImage.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image;
 
 use Intervention\Image\Interfaces\EncodedImageInterface;
diff --git a/src/Encoders/AutoEncoder.php b/src/Encoders/AutoEncoder.php
index 614b2e6a..0c909d1c 100644
--- a/src/Encoders/AutoEncoder.php
+++ b/src/Encoders/AutoEncoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Encoders;
 
 use Intervention\Image\Interfaces\EncodedImageInterface;
diff --git a/src/Encoders/AvifEncoder.php b/src/Encoders/AvifEncoder.php
index 82b84040..52ea1984 100644
--- a/src/Encoders/AvifEncoder.php
+++ b/src/Encoders/AvifEncoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Encoders;
 
 use Intervention\Image\Interfaces\SpecializableInterface;
diff --git a/src/Encoders/BmpEncoder.php b/src/Encoders/BmpEncoder.php
index d6321465..4cc94a29 100644
--- a/src/Encoders/BmpEncoder.php
+++ b/src/Encoders/BmpEncoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Encoders;
 
 use Intervention\Image\Interfaces\SpecializableInterface;
diff --git a/src/Encoders/FileExtensionEncoder.php b/src/Encoders/FileExtensionEncoder.php
index 629ba228..b0983f8a 100644
--- a/src/Encoders/FileExtensionEncoder.php
+++ b/src/Encoders/FileExtensionEncoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Encoders;
 
 use Intervention\Image\Exceptions\EncoderException;
diff --git a/src/Encoders/FilePathEncoder.php b/src/Encoders/FilePathEncoder.php
index 572a0dd4..d2a3df7f 100644
--- a/src/Encoders/FilePathEncoder.php
+++ b/src/Encoders/FilePathEncoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Encoders;
 
 use Intervention\Image\Interfaces\ImageInterface;
diff --git a/src/Encoders/GifEncoder.php b/src/Encoders/GifEncoder.php
index f6b1679b..ada62e63 100644
--- a/src/Encoders/GifEncoder.php
+++ b/src/Encoders/GifEncoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Encoders;
 
 use Intervention\Image\Interfaces\SpecializableInterface;
diff --git a/src/Encoders/HeicEncoder.php b/src/Encoders/HeicEncoder.php
index 5527072c..e86d49e1 100644
--- a/src/Encoders/HeicEncoder.php
+++ b/src/Encoders/HeicEncoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Encoders;
 
 use Intervention\Image\Interfaces\SpecializableInterface;
diff --git a/src/Encoders/Jpeg2000Encoder.php b/src/Encoders/Jpeg2000Encoder.php
index 720418d1..e46e7cd0 100644
--- a/src/Encoders/Jpeg2000Encoder.php
+++ b/src/Encoders/Jpeg2000Encoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Encoders;
 
 use Intervention\Image\Interfaces\SpecializableInterface;
diff --git a/src/Encoders/JpegEncoder.php b/src/Encoders/JpegEncoder.php
index ce2a24ab..95566fec 100644
--- a/src/Encoders/JpegEncoder.php
+++ b/src/Encoders/JpegEncoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Encoders;
 
 use Intervention\Image\Interfaces\SpecializableInterface;
diff --git a/src/Encoders/MediaTypeEncoder.php b/src/Encoders/MediaTypeEncoder.php
index 75ab1330..8072c74e 100644
--- a/src/Encoders/MediaTypeEncoder.php
+++ b/src/Encoders/MediaTypeEncoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Encoders;
 
 use Intervention\Image\Exceptions\EncoderException;
diff --git a/src/Encoders/PngEncoder.php b/src/Encoders/PngEncoder.php
index 9e25c992..42a8914d 100644
--- a/src/Encoders/PngEncoder.php
+++ b/src/Encoders/PngEncoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Encoders;
 
 use Intervention\Image\Interfaces\SpecializableInterface;
diff --git a/src/Encoders/SpecializableEncoder.php b/src/Encoders/SpecializableEncoder.php
index 957c07ca..f66ef15b 100644
--- a/src/Encoders/SpecializableEncoder.php
+++ b/src/Encoders/SpecializableEncoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Encoders;
 
 use Intervention\Image\Interfaces\EncodedImageInterface;
diff --git a/src/Encoders/TiffEncoder.php b/src/Encoders/TiffEncoder.php
index cd2c0794..9b94f1c5 100644
--- a/src/Encoders/TiffEncoder.php
+++ b/src/Encoders/TiffEncoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Encoders;
 
 use Intervention\Image\Interfaces\SpecializableInterface;
diff --git a/src/Encoders/WebpEncoder.php b/src/Encoders/WebpEncoder.php
index 492a4287..c3f5f181 100644
--- a/src/Encoders/WebpEncoder.php
+++ b/src/Encoders/WebpEncoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Encoders;
 
 use Intervention\Image\Interfaces\SpecializableInterface;
diff --git a/src/Exceptions/AnimationException.php b/src/Exceptions/AnimationException.php
index e77279bf..f2d4421b 100644
--- a/src/Exceptions/AnimationException.php
+++ b/src/Exceptions/AnimationException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Exceptions;
 
 class AnimationException extends \RuntimeException
diff --git a/src/Exceptions/ColorException.php b/src/Exceptions/ColorException.php
index 2287c115..4d3e1889 100644
--- a/src/Exceptions/ColorException.php
+++ b/src/Exceptions/ColorException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Exceptions;
 
 class ColorException extends \RuntimeException
diff --git a/src/Exceptions/DecoderException.php b/src/Exceptions/DecoderException.php
index a2cb273e..f9bc9d5c 100644
--- a/src/Exceptions/DecoderException.php
+++ b/src/Exceptions/DecoderException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Exceptions;
 
 class DecoderException extends \RuntimeException
diff --git a/src/Exceptions/EncoderException.php b/src/Exceptions/EncoderException.php
index a6ac36b4..a548e9ab 100644
--- a/src/Exceptions/EncoderException.php
+++ b/src/Exceptions/EncoderException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Exceptions;
 
 class EncoderException extends \RuntimeException
diff --git a/src/Exceptions/FontException.php b/src/Exceptions/FontException.php
index ec3e61c3..ed57aeb1 100644
--- a/src/Exceptions/FontException.php
+++ b/src/Exceptions/FontException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Exceptions;
 
 class FontException extends \RuntimeException
diff --git a/src/Exceptions/GeometryException.php b/src/Exceptions/GeometryException.php
index ec80e83c..b161ad2d 100644
--- a/src/Exceptions/GeometryException.php
+++ b/src/Exceptions/GeometryException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Exceptions;
 
 class GeometryException extends \RuntimeException
diff --git a/src/Exceptions/InputException.php b/src/Exceptions/InputException.php
index b20ec74d..322cee33 100644
--- a/src/Exceptions/InputException.php
+++ b/src/Exceptions/InputException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Exceptions;
 
 class InputException extends \RuntimeException
diff --git a/src/Exceptions/NotSupportedException.php b/src/Exceptions/NotSupportedException.php
index 05411b8f..a7018870 100644
--- a/src/Exceptions/NotSupportedException.php
+++ b/src/Exceptions/NotSupportedException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Exceptions;
 
 class NotSupportedException extends \RuntimeException
diff --git a/src/Exceptions/NotWritableException.php b/src/Exceptions/NotWritableException.php
index d93c6781..54048e62 100644
--- a/src/Exceptions/NotWritableException.php
+++ b/src/Exceptions/NotWritableException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Exceptions;
 
 class NotWritableException extends \RuntimeException
diff --git a/src/Exceptions/RuntimeException.php b/src/Exceptions/RuntimeException.php
index 188d86f6..a9bd494f 100644
--- a/src/Exceptions/RuntimeException.php
+++ b/src/Exceptions/RuntimeException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Exceptions;
 
 class RuntimeException extends \RuntimeException
diff --git a/src/File.php b/src/File.php
index 761b3a8d..06befe1b 100644
--- a/src/File.php
+++ b/src/File.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image;
 
 use Intervention\Image\Exceptions\NotWritableException;
diff --git a/src/Geometry/Circle.php b/src/Geometry/Circle.php
index 53c0c75f..2211d351 100644
--- a/src/Geometry/Circle.php
+++ b/src/Geometry/Circle.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Geometry;
 
 use Intervention\Image\Interfaces\PointInterface;
diff --git a/src/Geometry/Ellipse.php b/src/Geometry/Ellipse.php
index 8b95e526..1d157061 100644
--- a/src/Geometry/Ellipse.php
+++ b/src/Geometry/Ellipse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Geometry;
 
 use Intervention\Image\Geometry\Traits\HasBackgroundColor;
diff --git a/src/Geometry/Factories/CircleFactory.php b/src/Geometry/Factories/CircleFactory.php
index 118a5b4e..ed3565c9 100644
--- a/src/Geometry/Factories/CircleFactory.php
+++ b/src/Geometry/Factories/CircleFactory.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Geometry\Factories;
 
 class CircleFactory extends EllipseFactory
diff --git a/src/Geometry/Factories/EllipseFactory.php b/src/Geometry/Factories/EllipseFactory.php
index ebcd48a6..0a6081e7 100644
--- a/src/Geometry/Factories/EllipseFactory.php
+++ b/src/Geometry/Factories/EllipseFactory.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Geometry\Factories;
 
 use Intervention\Image\Geometry\Ellipse;
diff --git a/src/Geometry/Factories/LineFactory.php b/src/Geometry/Factories/LineFactory.php
index f22bc9aa..531f4cf0 100644
--- a/src/Geometry/Factories/LineFactory.php
+++ b/src/Geometry/Factories/LineFactory.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Geometry\Factories;
 
 use Intervention\Image\Geometry\Point;
diff --git a/src/Geometry/Factories/PolygonFactory.php b/src/Geometry/Factories/PolygonFactory.php
index 919b8f14..f1acc7d9 100644
--- a/src/Geometry/Factories/PolygonFactory.php
+++ b/src/Geometry/Factories/PolygonFactory.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Geometry\Factories;
 
 use Intervention\Image\Geometry\Point;
diff --git a/src/Geometry/Factories/RectangleFactory.php b/src/Geometry/Factories/RectangleFactory.php
index a8edb3ab..be402ffc 100644
--- a/src/Geometry/Factories/RectangleFactory.php
+++ b/src/Geometry/Factories/RectangleFactory.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Geometry\Factories;
 
 use Intervention\Image\Geometry\Point;
diff --git a/src/Geometry/Line.php b/src/Geometry/Line.php
index 51aca33e..eb879f7a 100644
--- a/src/Geometry/Line.php
+++ b/src/Geometry/Line.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Geometry;
 
 use Intervention\Image\Geometry\Traits\HasBackgroundColor;
diff --git a/src/Geometry/Pixel.php b/src/Geometry/Pixel.php
index f6784250..188da3ec 100644
--- a/src/Geometry/Pixel.php
+++ b/src/Geometry/Pixel.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Geometry;
 
 use Intervention\Image\Interfaces\ColorInterface;
diff --git a/src/Geometry/Point.php b/src/Geometry/Point.php
index d0184aae..b08bb847 100644
--- a/src/Geometry/Point.php
+++ b/src/Geometry/Point.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Geometry;
 
 use Intervention\Image\Interfaces\PointInterface;
diff --git a/src/Geometry/Polygon.php b/src/Geometry/Polygon.php
index 0567a9d6..13c92e4c 100644
--- a/src/Geometry/Polygon.php
+++ b/src/Geometry/Polygon.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Geometry;
 
 use ArrayAccess;
diff --git a/src/Geometry/Rectangle.php b/src/Geometry/Rectangle.php
index 46b09075..5ce618a6 100644
--- a/src/Geometry/Rectangle.php
+++ b/src/Geometry/Rectangle.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Geometry;
 
 use Intervention\Image\Geometry\Tools\RectangleResizer;
diff --git a/src/Geometry/Tools/RectangleResizer.php b/src/Geometry/Tools/RectangleResizer.php
index 0f78f11c..0fc5364b 100644
--- a/src/Geometry/Tools/RectangleResizer.php
+++ b/src/Geometry/Tools/RectangleResizer.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Geometry\Tools;
 
 use Intervention\Image\Exceptions\GeometryException;
diff --git a/src/Geometry/Traits/HasBackgroundColor.php b/src/Geometry/Traits/HasBackgroundColor.php
index bc28d42f..a18c8b4a 100644
--- a/src/Geometry/Traits/HasBackgroundColor.php
+++ b/src/Geometry/Traits/HasBackgroundColor.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Geometry\Traits;
 
 trait HasBackgroundColor
diff --git a/src/Geometry/Traits/HasBorder.php b/src/Geometry/Traits/HasBorder.php
index b76bef98..57ff83ae 100644
--- a/src/Geometry/Traits/HasBorder.php
+++ b/src/Geometry/Traits/HasBorder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Geometry\Traits;
 
 trait HasBorder
diff --git a/src/Image.php b/src/Image.php
index 7f705235..4de96baa 100644
--- a/src/Image.php
+++ b/src/Image.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image;
 
 use Traversable;
diff --git a/src/ImageManager.php b/src/ImageManager.php
index d600620a..aa6ebbf4 100644
--- a/src/ImageManager.php
+++ b/src/ImageManager.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image;
 
 use Intervention\Image\Interfaces\DriverInterface;
diff --git a/src/Interfaces/AnalyzerInterface.php b/src/Interfaces/AnalyzerInterface.php
index 4842827c..88c96d9b 100644
--- a/src/Interfaces/AnalyzerInterface.php
+++ b/src/Interfaces/AnalyzerInterface.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Interfaces;
 
 interface AnalyzerInterface
diff --git a/src/Interfaces/CollectionInterface.php b/src/Interfaces/CollectionInterface.php
index 2a7fc92e..ef767713 100644
--- a/src/Interfaces/CollectionInterface.php
+++ b/src/Interfaces/CollectionInterface.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Interfaces;
 
 use Traversable;
diff --git a/src/Interfaces/ColorChannelInterface.php b/src/Interfaces/ColorChannelInterface.php
index a5bc074f..669591b4 100644
--- a/src/Interfaces/ColorChannelInterface.php
+++ b/src/Interfaces/ColorChannelInterface.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Interfaces;
 
 interface ColorChannelInterface
diff --git a/src/Interfaces/ColorInterface.php b/src/Interfaces/ColorInterface.php
index cc09dc14..bfb1f726 100644
--- a/src/Interfaces/ColorInterface.php
+++ b/src/Interfaces/ColorInterface.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Interfaces;
 
 interface ColorInterface
diff --git a/src/Interfaces/ColorProcessorInterface.php b/src/Interfaces/ColorProcessorInterface.php
index cfe57bb4..a1aba983 100644
--- a/src/Interfaces/ColorProcessorInterface.php
+++ b/src/Interfaces/ColorProcessorInterface.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Interfaces;
 
 interface ColorProcessorInterface
diff --git a/src/Interfaces/ColorspaceInterface.php b/src/Interfaces/ColorspaceInterface.php
index ae6e0fdb..63536804 100644
--- a/src/Interfaces/ColorspaceInterface.php
+++ b/src/Interfaces/ColorspaceInterface.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Interfaces;
 
 interface ColorspaceInterface
diff --git a/src/Interfaces/CoreInterface.php b/src/Interfaces/CoreInterface.php
index 772579fa..8909a7f1 100644
--- a/src/Interfaces/CoreInterface.php
+++ b/src/Interfaces/CoreInterface.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Interfaces;
 
 interface CoreInterface extends CollectionInterface
diff --git a/src/Interfaces/DecoderInterface.php b/src/Interfaces/DecoderInterface.php
index 58eec423..26d9b1be 100644
--- a/src/Interfaces/DecoderInterface.php
+++ b/src/Interfaces/DecoderInterface.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Interfaces;
 
 interface DecoderInterface
diff --git a/src/Interfaces/DrawableInterface.php b/src/Interfaces/DrawableInterface.php
index 767cae55..e48e2765 100644
--- a/src/Interfaces/DrawableInterface.php
+++ b/src/Interfaces/DrawableInterface.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Interfaces;
 
 interface DrawableInterface
diff --git a/src/Interfaces/DriverInterface.php b/src/Interfaces/DriverInterface.php
index 2f09dc7a..9fb01b19 100644
--- a/src/Interfaces/DriverInterface.php
+++ b/src/Interfaces/DriverInterface.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Interfaces;
 
 interface DriverInterface
diff --git a/src/Interfaces/EncodedImageInterface.php b/src/Interfaces/EncodedImageInterface.php
index 16f8e84c..b50f8232 100644
--- a/src/Interfaces/EncodedImageInterface.php
+++ b/src/Interfaces/EncodedImageInterface.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Interfaces;
 
 interface EncodedImageInterface extends FileInterface
diff --git a/src/Interfaces/EncoderInterface.php b/src/Interfaces/EncoderInterface.php
index 43ee1288..8f3cdbf4 100644
--- a/src/Interfaces/EncoderInterface.php
+++ b/src/Interfaces/EncoderInterface.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Interfaces;
 
 interface EncoderInterface
diff --git a/src/Interfaces/FileInterface.php b/src/Interfaces/FileInterface.php
index bf3ddbc8..b6bc37a6 100644
--- a/src/Interfaces/FileInterface.php
+++ b/src/Interfaces/FileInterface.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Interfaces;
 
 interface FileInterface
diff --git a/src/Interfaces/FontInterface.php b/src/Interfaces/FontInterface.php
index 873549bd..3bfffba0 100644
--- a/src/Interfaces/FontInterface.php
+++ b/src/Interfaces/FontInterface.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Interfaces;
 
 interface FontInterface
diff --git a/src/Interfaces/FrameInterface.php b/src/Interfaces/FrameInterface.php
index b56746f3..da559c2f 100644
--- a/src/Interfaces/FrameInterface.php
+++ b/src/Interfaces/FrameInterface.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Interfaces;
 
 interface FrameInterface
diff --git a/src/Interfaces/ImageInterface.php b/src/Interfaces/ImageInterface.php
index 1384fc4f..d4b90d1d 100644
--- a/src/Interfaces/ImageInterface.php
+++ b/src/Interfaces/ImageInterface.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Interfaces;
 
 use Countable;
diff --git a/src/Interfaces/InputHandlerInterface.php b/src/Interfaces/InputHandlerInterface.php
index 44984917..108ad30e 100644
--- a/src/Interfaces/InputHandlerInterface.php
+++ b/src/Interfaces/InputHandlerInterface.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Interfaces;
 
 interface InputHandlerInterface
diff --git a/src/Interfaces/ModifierInterface.php b/src/Interfaces/ModifierInterface.php
index 8786ae66..2fb0f8b4 100644
--- a/src/Interfaces/ModifierInterface.php
+++ b/src/Interfaces/ModifierInterface.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Interfaces;
 
 interface ModifierInterface
diff --git a/src/Interfaces/PointInterface.php b/src/Interfaces/PointInterface.php
index 9ed05154..f2e109b9 100644
--- a/src/Interfaces/PointInterface.php
+++ b/src/Interfaces/PointInterface.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Interfaces;
 
 interface PointInterface
diff --git a/src/Interfaces/ProfileInterface.php b/src/Interfaces/ProfileInterface.php
index 4a3d8e59..925aae36 100644
--- a/src/Interfaces/ProfileInterface.php
+++ b/src/Interfaces/ProfileInterface.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Interfaces;
 
 interface ProfileInterface
diff --git a/src/Interfaces/ResolutionInterface.php b/src/Interfaces/ResolutionInterface.php
index 2ee64a2b..bf7e137e 100644
--- a/src/Interfaces/ResolutionInterface.php
+++ b/src/Interfaces/ResolutionInterface.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Interfaces;
 
 interface ResolutionInterface
diff --git a/src/Interfaces/SizeInterface.php b/src/Interfaces/SizeInterface.php
index 38c586d6..95972de5 100644
--- a/src/Interfaces/SizeInterface.php
+++ b/src/Interfaces/SizeInterface.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Interfaces;
 
 interface SizeInterface
diff --git a/src/Interfaces/SpecializableInterface.php b/src/Interfaces/SpecializableInterface.php
index 24ba6a4b..7cc69fa5 100644
--- a/src/Interfaces/SpecializableInterface.php
+++ b/src/Interfaces/SpecializableInterface.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Interfaces;
 
 interface SpecializableInterface
diff --git a/src/Interfaces/SpecializedInterface.php b/src/Interfaces/SpecializedInterface.php
index 9626db7a..5d63758a 100644
--- a/src/Interfaces/SpecializedInterface.php
+++ b/src/Interfaces/SpecializedInterface.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Interfaces;
 
 interface SpecializedInterface
diff --git a/src/ModifierStack.php b/src/ModifierStack.php
index 109fbfc9..a55719e9 100644
--- a/src/ModifierStack.php
+++ b/src/ModifierStack.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image;
 
 use Intervention\Image\Interfaces\ImageInterface;
diff --git a/src/Modifiers/BlendTransparencyModifier.php b/src/Modifiers/BlendTransparencyModifier.php
index d031921a..7845afbb 100644
--- a/src/Modifiers/BlendTransparencyModifier.php
+++ b/src/Modifiers/BlendTransparencyModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 class BlendTransparencyModifier extends SpecializableModifier
diff --git a/src/Modifiers/BlurModifier.php b/src/Modifiers/BlurModifier.php
index f357d474..384d9a35 100644
--- a/src/Modifiers/BlurModifier.php
+++ b/src/Modifiers/BlurModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 class BlurModifier extends SpecializableModifier
diff --git a/src/Modifiers/BrightnessModifier.php b/src/Modifiers/BrightnessModifier.php
index d1be68a6..42ae6f3e 100644
--- a/src/Modifiers/BrightnessModifier.php
+++ b/src/Modifiers/BrightnessModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 class BrightnessModifier extends SpecializableModifier
diff --git a/src/Modifiers/ColorizeModifier.php b/src/Modifiers/ColorizeModifier.php
index 5a34daa2..13bdbc77 100644
--- a/src/Modifiers/ColorizeModifier.php
+++ b/src/Modifiers/ColorizeModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 class ColorizeModifier extends SpecializableModifier
diff --git a/src/Modifiers/ColorspaceModifier.php b/src/Modifiers/ColorspaceModifier.php
index 2821ea00..bd4bc69b 100644
--- a/src/Modifiers/ColorspaceModifier.php
+++ b/src/Modifiers/ColorspaceModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 use Intervention\Image\Interfaces\ColorspaceInterface;
diff --git a/src/Modifiers/ContainModifier.php b/src/Modifiers/ContainModifier.php
index 910c8232..03826887 100644
--- a/src/Modifiers/ContainModifier.php
+++ b/src/Modifiers/ContainModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 use Intervention\Image\Geometry\Rectangle;
diff --git a/src/Modifiers/ContrastModifier.php b/src/Modifiers/ContrastModifier.php
index 596aa16c..84fa4873 100644
--- a/src/Modifiers/ContrastModifier.php
+++ b/src/Modifiers/ContrastModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 class ContrastModifier extends SpecializableModifier
diff --git a/src/Modifiers/CoverDownModifier.php b/src/Modifiers/CoverDownModifier.php
index 4ed2513d..50e21407 100644
--- a/src/Modifiers/CoverDownModifier.php
+++ b/src/Modifiers/CoverDownModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 class CoverDownModifier extends CoverModifier
diff --git a/src/Modifiers/CoverModifier.php b/src/Modifiers/CoverModifier.php
index 5e3e4b7b..7b78c757 100644
--- a/src/Modifiers/CoverModifier.php
+++ b/src/Modifiers/CoverModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 use Intervention\Image\Geometry\Rectangle;
diff --git a/src/Modifiers/CropModifier.php b/src/Modifiers/CropModifier.php
index 8976c994..3979f25a 100644
--- a/src/Modifiers/CropModifier.php
+++ b/src/Modifiers/CropModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 use Intervention\Image\Geometry\Rectangle;
diff --git a/src/Modifiers/DrawEllipseModifier.php b/src/Modifiers/DrawEllipseModifier.php
index 0a09100a..0ef06224 100644
--- a/src/Modifiers/DrawEllipseModifier.php
+++ b/src/Modifiers/DrawEllipseModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 use Intervention\Image\Geometry\Ellipse;
diff --git a/src/Modifiers/DrawLineModifier.php b/src/Modifiers/DrawLineModifier.php
index b36da029..d0b70e4a 100644
--- a/src/Modifiers/DrawLineModifier.php
+++ b/src/Modifiers/DrawLineModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 use Intervention\Image\Geometry\Line;
diff --git a/src/Modifiers/DrawPixelModifier.php b/src/Modifiers/DrawPixelModifier.php
index 64001b39..d9150397 100644
--- a/src/Modifiers/DrawPixelModifier.php
+++ b/src/Modifiers/DrawPixelModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 use Intervention\Image\Interfaces\PointInterface;
diff --git a/src/Modifiers/DrawPolygonModifier.php b/src/Modifiers/DrawPolygonModifier.php
index 7ba3a028..4e5531ee 100644
--- a/src/Modifiers/DrawPolygonModifier.php
+++ b/src/Modifiers/DrawPolygonModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 use Intervention\Image\Geometry\Polygon;
diff --git a/src/Modifiers/DrawRectangleModifier.php b/src/Modifiers/DrawRectangleModifier.php
index eaee3751..f6a5122a 100644
--- a/src/Modifiers/DrawRectangleModifier.php
+++ b/src/Modifiers/DrawRectangleModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 use Intervention\Image\Geometry\Rectangle;
diff --git a/src/Modifiers/FillModifier.php b/src/Modifiers/FillModifier.php
index 6fe1c7a8..7ee088b0 100644
--- a/src/Modifiers/FillModifier.php
+++ b/src/Modifiers/FillModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 use Intervention\Image\Geometry\Point;
diff --git a/src/Modifiers/FlipModifier.php b/src/Modifiers/FlipModifier.php
index f98904ba..ea464852 100644
--- a/src/Modifiers/FlipModifier.php
+++ b/src/Modifiers/FlipModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 class FlipModifier extends SpecializableModifier
diff --git a/src/Modifiers/FlopModifier.php b/src/Modifiers/FlopModifier.php
index 4aedbc20..50ceb6b6 100644
--- a/src/Modifiers/FlopModifier.php
+++ b/src/Modifiers/FlopModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 class FlopModifier extends SpecializableModifier
diff --git a/src/Modifiers/GammaModifier.php b/src/Modifiers/GammaModifier.php
index a5b708e7..c99c81b4 100644
--- a/src/Modifiers/GammaModifier.php
+++ b/src/Modifiers/GammaModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 class GammaModifier extends SpecializableModifier
diff --git a/src/Modifiers/GreyscaleModifier.php b/src/Modifiers/GreyscaleModifier.php
index af4fb470..034008d4 100644
--- a/src/Modifiers/GreyscaleModifier.php
+++ b/src/Modifiers/GreyscaleModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 class GreyscaleModifier extends SpecializableModifier
diff --git a/src/Modifiers/InvertModifier.php b/src/Modifiers/InvertModifier.php
index c04df6e3..9eff2778 100644
--- a/src/Modifiers/InvertModifier.php
+++ b/src/Modifiers/InvertModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 class InvertModifier extends SpecializableModifier
diff --git a/src/Modifiers/PadModifier.php b/src/Modifiers/PadModifier.php
index ee1e2e16..bfefcf08 100644
--- a/src/Modifiers/PadModifier.php
+++ b/src/Modifiers/PadModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 use Intervention\Image\Interfaces\ImageInterface;
diff --git a/src/Modifiers/PixelateModifier.php b/src/Modifiers/PixelateModifier.php
index b4048680..1468d428 100644
--- a/src/Modifiers/PixelateModifier.php
+++ b/src/Modifiers/PixelateModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 class PixelateModifier extends SpecializableModifier
diff --git a/src/Modifiers/PlaceModifier.php b/src/Modifiers/PlaceModifier.php
index 144253a5..50f32694 100644
--- a/src/Modifiers/PlaceModifier.php
+++ b/src/Modifiers/PlaceModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 use Intervention\Image\Interfaces\ImageInterface;
diff --git a/src/Modifiers/ProfileModifier.php b/src/Modifiers/ProfileModifier.php
index 77686b2a..372f16ab 100644
--- a/src/Modifiers/ProfileModifier.php
+++ b/src/Modifiers/ProfileModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 use Intervention\Image\Interfaces\ProfileInterface;
diff --git a/src/Modifiers/ProfileRemovalModifier.php b/src/Modifiers/ProfileRemovalModifier.php
index 3839f6d0..978565db 100644
--- a/src/Modifiers/ProfileRemovalModifier.php
+++ b/src/Modifiers/ProfileRemovalModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 class ProfileRemovalModifier extends SpecializableModifier
diff --git a/src/Modifiers/QuantizeColorsModifier.php b/src/Modifiers/QuantizeColorsModifier.php
index f329d8e8..a5507ef4 100644
--- a/src/Modifiers/QuantizeColorsModifier.php
+++ b/src/Modifiers/QuantizeColorsModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 class QuantizeColorsModifier extends SpecializableModifier
diff --git a/src/Modifiers/RemoveAnimationModifier.php b/src/Modifiers/RemoveAnimationModifier.php
index cedd15da..c950d825 100644
--- a/src/Modifiers/RemoveAnimationModifier.php
+++ b/src/Modifiers/RemoveAnimationModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 use Intervention\Image\Exceptions\InputException;
diff --git a/src/Modifiers/ResizeCanvasModifier.php b/src/Modifiers/ResizeCanvasModifier.php
index bc4d092f..37fec17d 100644
--- a/src/Modifiers/ResizeCanvasModifier.php
+++ b/src/Modifiers/ResizeCanvasModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 use Intervention\Image\Geometry\Rectangle;
diff --git a/src/Modifiers/ResizeCanvasRelativeModifier.php b/src/Modifiers/ResizeCanvasRelativeModifier.php
index eb11746c..5d959bbd 100644
--- a/src/Modifiers/ResizeCanvasRelativeModifier.php
+++ b/src/Modifiers/ResizeCanvasRelativeModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 use Intervention\Image\Geometry\Rectangle;
diff --git a/src/Modifiers/ResizeDownModifier.php b/src/Modifiers/ResizeDownModifier.php
index 30ff067a..a8591d9f 100644
--- a/src/Modifiers/ResizeDownModifier.php
+++ b/src/Modifiers/ResizeDownModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 class ResizeDownModifier extends ResizeModifier
diff --git a/src/Modifiers/ResizeModifier.php b/src/Modifiers/ResizeModifier.php
index 1aa69f7b..34b7eb48 100644
--- a/src/Modifiers/ResizeModifier.php
+++ b/src/Modifiers/ResizeModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 class ResizeModifier extends SpecializableModifier
diff --git a/src/Modifiers/ResolutionModifier.php b/src/Modifiers/ResolutionModifier.php
index ffb36917..fc91bfec 100644
--- a/src/Modifiers/ResolutionModifier.php
+++ b/src/Modifiers/ResolutionModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 class ResolutionModifier extends SpecializableModifier
diff --git a/src/Modifiers/RotateModifier.php b/src/Modifiers/RotateModifier.php
index 15d91e60..feb6c7fe 100644
--- a/src/Modifiers/RotateModifier.php
+++ b/src/Modifiers/RotateModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 class RotateModifier extends SpecializableModifier
diff --git a/src/Modifiers/ScaleDownModifier.php b/src/Modifiers/ScaleDownModifier.php
index 34367f30..a0f6ac99 100644
--- a/src/Modifiers/ScaleDownModifier.php
+++ b/src/Modifiers/ScaleDownModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 class ScaleDownModifier extends ScaleModifier
diff --git a/src/Modifiers/ScaleModifier.php b/src/Modifiers/ScaleModifier.php
index 78d0b059..61b5927d 100644
--- a/src/Modifiers/ScaleModifier.php
+++ b/src/Modifiers/ScaleModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 class ScaleModifier extends ResizeModifier
diff --git a/src/Modifiers/SharpenModifier.php b/src/Modifiers/SharpenModifier.php
index 1056ac3b..32aa4728 100644
--- a/src/Modifiers/SharpenModifier.php
+++ b/src/Modifiers/SharpenModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 class SharpenModifier extends SpecializableModifier
diff --git a/src/Modifiers/SliceAnimationModifier.php b/src/Modifiers/SliceAnimationModifier.php
index ca86cc7d..4d26a669 100644
--- a/src/Modifiers/SliceAnimationModifier.php
+++ b/src/Modifiers/SliceAnimationModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 class SliceAnimationModifier extends SpecializableModifier
diff --git a/src/Modifiers/SpecializableModifier.php b/src/Modifiers/SpecializableModifier.php
index b0e25468..dfab61b8 100644
--- a/src/Modifiers/SpecializableModifier.php
+++ b/src/Modifiers/SpecializableModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 use Intervention\Image\Interfaces\ImageInterface;
diff --git a/src/Modifiers/TextModifier.php b/src/Modifiers/TextModifier.php
index 5ac351fe..b9068620 100644
--- a/src/Modifiers/TextModifier.php
+++ b/src/Modifiers/TextModifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Modifiers;
 
 use Intervention\Image\Geometry\Point;
diff --git a/src/Origin.php b/src/Origin.php
index ed15a283..9aa4780f 100644
--- a/src/Origin.php
+++ b/src/Origin.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image;
 
 class Origin
diff --git a/src/Resolution.php b/src/Resolution.php
index 625370ce..3facc5d5 100644
--- a/src/Resolution.php
+++ b/src/Resolution.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image;
 
 use Intervention\Image\Interfaces\ResolutionInterface;
diff --git a/src/Traits/CanBuildFilePointer.php b/src/Traits/CanBuildFilePointer.php
index 912f72a5..258ef7ec 100644
--- a/src/Traits/CanBuildFilePointer.php
+++ b/src/Traits/CanBuildFilePointer.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Traits;
 
 trait CanBuildFilePointer
diff --git a/src/Typography/Font.php b/src/Typography/Font.php
index dc6c9208..e19d27ef 100644
--- a/src/Typography/Font.php
+++ b/src/Typography/Font.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Typography;
 
 use Intervention\Image\Interfaces\FontInterface;
diff --git a/src/Typography/FontFactory.php b/src/Typography/FontFactory.php
index d23cd613..274fe174 100644
--- a/src/Typography/FontFactory.php
+++ b/src/Typography/FontFactory.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Typography;
 
 use Intervention\Image\Interfaces\FontInterface;
diff --git a/src/Typography/Line.php b/src/Typography/Line.php
index 88d84c58..f136175f 100644
--- a/src/Typography/Line.php
+++ b/src/Typography/Line.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Typography;
 
 use Intervention\Image\Geometry\Point;
diff --git a/src/Typography/TextBlock.php b/src/Typography/TextBlock.php
index 2eea0f13..c2eddb7e 100644
--- a/src/Typography/TextBlock.php
+++ b/src/Typography/TextBlock.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Typography;
 
 use Intervention\Image\Collection;
@@ -46,11 +48,11 @@ class TextBlock extends Collection
     public function longestLine(): Line
     {
         $lines = $this->lines();
-        usort($lines, function ($a, $b) {
-            if (mb_strlen($a) === mb_strlen($b)) {
+        usort($lines, function (Line $a, Line $b) {
+            if (mb_strlen((string) $a) === mb_strlen((string) $b)) {
                 return 0;
             }
-            return (mb_strlen($a) > mb_strlen($b)) ? -1 : 1;
+            return (mb_strlen((string) $a) > mb_strlen((string) $b)) ? -1 : 1;
         });
 
         return $lines[0];
diff --git a/tests/CollectionTest.php b/tests/CollectionTest.php
index 7df66225..76863af7 100644
--- a/tests/CollectionTest.php
+++ b/tests/CollectionTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests;
 
 use Intervention\Image\Collection;
diff --git a/tests/Colors/Cmyk/ChannelTest.php b/tests/Colors/Cmyk/ChannelTest.php
index a282712a..3b0c82e2 100644
--- a/tests/Colors/Cmyk/ChannelTest.php
+++ b/tests/Colors/Cmyk/ChannelTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Colors\Cmyk;
 
 use Intervention\Image\Colors\Cmyk\Channels\Cyan as Channel;
diff --git a/tests/Colors/Cmyk/ColorTest.php b/tests/Colors/Cmyk/ColorTest.php
index 71da6093..42a386f1 100644
--- a/tests/Colors/Cmyk/ColorTest.php
+++ b/tests/Colors/Cmyk/ColorTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Colors\Cmyk;
 
 use Intervention\Image\Colors\Cmyk\Channels\Cyan;
diff --git a/tests/Colors/Cmyk/ColorspaceTest.php b/tests/Colors/Cmyk/ColorspaceTest.php
index dacd8fed..55717ff3 100644
--- a/tests/Colors/Cmyk/ColorspaceTest.php
+++ b/tests/Colors/Cmyk/ColorspaceTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Colors\Cmyk;
 
 use Intervention\Image\Colors\Cmyk\Channels\Cyan;
diff --git a/tests/Colors/Cmyk/Decoders/StringColorDecoderTest.php b/tests/Colors/Cmyk/Decoders/StringColorDecoderTest.php
index f6af4237..f73093c8 100644
--- a/tests/Colors/Cmyk/Decoders/StringColorDecoderTest.php
+++ b/tests/Colors/Cmyk/Decoders/StringColorDecoderTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Colors\Cmyk\Decoders;
 
 use Intervention\Image\Colors\Cmyk\Color;
diff --git a/tests/Colors/Hsl/ChannelTest.php b/tests/Colors/Hsl/ChannelTest.php
index f2b3b9a8..e86254a0 100644
--- a/tests/Colors/Hsl/ChannelTest.php
+++ b/tests/Colors/Hsl/ChannelTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Colors\Hsl;
 
 use Intervention\Image\Colors\Hsl\Channels\Hue;
diff --git a/tests/Colors/Hsl/Channels/SaturationTest.php b/tests/Colors/Hsl/Channels/SaturationTest.php
index a4a610d0..684cfeef 100644
--- a/tests/Colors/Hsl/Channels/SaturationTest.php
+++ b/tests/Colors/Hsl/Channels/SaturationTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Colors\Hsl\Channels;
 
 use Intervention\Image\Colors\Hsl\Channels\Saturation;
diff --git a/tests/Colors/Hsl/ColorTest.php b/tests/Colors/Hsl/ColorTest.php
index 3ed2ed06..45743a1a 100644
--- a/tests/Colors/Hsl/ColorTest.php
+++ b/tests/Colors/Hsl/ColorTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Colors\Hsl;
 
 use Intervention\Image\Colors\Hsl\Channels\Hue;
diff --git a/tests/Colors/Hsl/ColorspaceTest.php b/tests/Colors/Hsl/ColorspaceTest.php
index 365a8e7b..3a785aac 100644
--- a/tests/Colors/Hsl/ColorspaceTest.php
+++ b/tests/Colors/Hsl/ColorspaceTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Colors\Hsl;
 
 use Intervention\Image\Colors\Cmyk\Color as CmykColor;
diff --git a/tests/Colors/Hsl/Decoders/StringColorDecoderTest.php b/tests/Colors/Hsl/Decoders/StringColorDecoderTest.php
index 351ba02d..8c79364b 100644
--- a/tests/Colors/Hsl/Decoders/StringColorDecoderTest.php
+++ b/tests/Colors/Hsl/Decoders/StringColorDecoderTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Colors\Hsl\Decoders;
 
 use Intervention\Image\Colors\Hsl\Color;
diff --git a/tests/Colors/Hsv/ChannelTest.php b/tests/Colors/Hsv/ChannelTest.php
index 003f783e..68c866cd 100644
--- a/tests/Colors/Hsv/ChannelTest.php
+++ b/tests/Colors/Hsv/ChannelTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Colors\Hsv;
 
 use Intervention\Image\Colors\Hsv\Channels\Hue;
diff --git a/tests/Colors/Hsv/Channels/SaturationTest.php b/tests/Colors/Hsv/Channels/SaturationTest.php
index 021c7e57..04892b52 100644
--- a/tests/Colors/Hsv/Channels/SaturationTest.php
+++ b/tests/Colors/Hsv/Channels/SaturationTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Colors\Hsv\Channels;
 
 use Intervention\Image\Colors\Hsv\Channels\Saturation;
diff --git a/tests/Colors/Hsv/Channels/ValueTest.php b/tests/Colors/Hsv/Channels/ValueTest.php
index 7a098842..afe7cd12 100644
--- a/tests/Colors/Hsv/Channels/ValueTest.php
+++ b/tests/Colors/Hsv/Channels/ValueTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Colors\Hsv\Channels;
 
 use Intervention\Image\Colors\Hsv\Channels\Value;
diff --git a/tests/Colors/Hsv/ColorTest.php b/tests/Colors/Hsv/ColorTest.php
index 64d015a7..08f1c746 100644
--- a/tests/Colors/Hsv/ColorTest.php
+++ b/tests/Colors/Hsv/ColorTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Colors\Hsv;
 
 use Intervention\Image\Colors\Hsv\Channels\Hue;
diff --git a/tests/Colors/Hsv/ColorspaceTest.php b/tests/Colors/Hsv/ColorspaceTest.php
index 00def55a..cc300471 100644
--- a/tests/Colors/Hsv/ColorspaceTest.php
+++ b/tests/Colors/Hsv/ColorspaceTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Colors\Hsv;
 
 use Intervention\Image\Colors\Cmyk\Color as CmykColor;
diff --git a/tests/Colors/Hsv/Decoders/StringColorDecoderTest.php b/tests/Colors/Hsv/Decoders/StringColorDecoderTest.php
index 6aa95c89..40a0c283 100644
--- a/tests/Colors/Hsv/Decoders/StringColorDecoderTest.php
+++ b/tests/Colors/Hsv/Decoders/StringColorDecoderTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Colors\Hsv\Decoders;
 
 use Intervention\Image\Colors\Hsv\Color;
diff --git a/tests/Colors/Rgb/ChannelTest.php b/tests/Colors/Rgb/ChannelTest.php
index 72168bb3..7982d2ae 100644
--- a/tests/Colors/Rgb/ChannelTest.php
+++ b/tests/Colors/Rgb/ChannelTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Colors\Rgb;
 
 use Intervention\Image\Colors\Rgb\Channels\Red as Channel;
diff --git a/tests/Colors/Rgb/Channels/AlphaTest.php b/tests/Colors/Rgb/Channels/AlphaTest.php
index 989b751f..1aed0fac 100644
--- a/tests/Colors/Rgb/Channels/AlphaTest.php
+++ b/tests/Colors/Rgb/Channels/AlphaTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Colors\Rgb\Channels;
 
 use Intervention\Image\Colors\Rgb\Channels\Alpha;
diff --git a/tests/Colors/Rgb/ColorTest.php b/tests/Colors/Rgb/ColorTest.php
index bdd5a7cf..bda8d459 100644
--- a/tests/Colors/Rgb/ColorTest.php
+++ b/tests/Colors/Rgb/ColorTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Colors\Rgb;
 
 use Intervention\Image\Colors\Cmyk\Color as CmykColor;
diff --git a/tests/Colors/Rgb/ColorspaceTest.php b/tests/Colors/Rgb/ColorspaceTest.php
index a79727d4..b4202000 100644
--- a/tests/Colors/Rgb/ColorspaceTest.php
+++ b/tests/Colors/Rgb/ColorspaceTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Colors\Rgb;
 
 use Intervention\Image\Colors\Cmyk\Color as CmykColor;
diff --git a/tests/Colors/Rgb/Decoders/HexColorDecoderTest.php b/tests/Colors/Rgb/Decoders/HexColorDecoderTest.php
index 439b533f..1f82d3fb 100644
--- a/tests/Colors/Rgb/Decoders/HexColorDecoderTest.php
+++ b/tests/Colors/Rgb/Decoders/HexColorDecoderTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Colors\Rgb\Decoders;
 
 use Intervention\Image\Colors\Rgb\Color;
diff --git a/tests/Colors/Rgb/Decoders/HtmlColornameDecoderTest.php b/tests/Colors/Rgb/Decoders/HtmlColornameDecoderTest.php
index 843d7a15..0b82fc9f 100644
--- a/tests/Colors/Rgb/Decoders/HtmlColornameDecoderTest.php
+++ b/tests/Colors/Rgb/Decoders/HtmlColornameDecoderTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Colors\Rgb\Decoders;
 
 use Intervention\Image\Colors\Rgb\Color;
diff --git a/tests/Colors/Rgb/Decoders/StringColorDecoderTest.php b/tests/Colors/Rgb/Decoders/StringColorDecoderTest.php
index 956fe100..d3c22ce1 100644
--- a/tests/Colors/Rgb/Decoders/StringColorDecoderTest.php
+++ b/tests/Colors/Rgb/Decoders/StringColorDecoderTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Colors\Rgb\Decoders;
 
 use Intervention\Image\Colors\Rgb\Color;
diff --git a/tests/Decoders/SpecializableDecoderTest.php b/tests/Decoders/SpecializableDecoderTest.php
index f991542d..e7b4637f 100644
--- a/tests/Decoders/SpecializableDecoderTest.php
+++ b/tests/Decoders/SpecializableDecoderTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Decoders;
 
 use Intervention\Image\Decoders\SpecializableDecoder;
diff --git a/tests/Drivers/Gd/Analyzers/ColorspaceAnalyzerTest.php b/tests/Drivers/Gd/Analyzers/ColorspaceAnalyzerTest.php
index 873d2853..5cfb3d5d 100644
--- a/tests/Drivers/Gd/Analyzers/ColorspaceAnalyzerTest.php
+++ b/tests/Drivers/Gd/Analyzers/ColorspaceAnalyzerTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Analyzers;
 
 use Intervention\Image\Analyzers\ColorspaceAnalyzer;
diff --git a/tests/Drivers/Gd/Analyzers/HeightAnalyzerTest.php b/tests/Drivers/Gd/Analyzers/HeightAnalyzerTest.php
index c35933e7..3afa9660 100644
--- a/tests/Drivers/Gd/Analyzers/HeightAnalyzerTest.php
+++ b/tests/Drivers/Gd/Analyzers/HeightAnalyzerTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Analyzers;
 
 use Intervention\Image\Analyzers\HeightAnalyzer;
diff --git a/tests/Drivers/Gd/Analyzers/PixelColorAnalyzer.php b/tests/Drivers/Gd/Analyzers/PixelColorAnalyzer.php
index b1308e5e..8ec5421d 100644
--- a/tests/Drivers/Gd/Analyzers/PixelColorAnalyzer.php
+++ b/tests/Drivers/Gd/Analyzers/PixelColorAnalyzer.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Analyzers;
 
 use Intervention\Image\Analyzers\PixelColorAnalyzer;
diff --git a/tests/Drivers/Gd/Analyzers/PixelColorAnalyzerTest.php b/tests/Drivers/Gd/Analyzers/PixelColorAnalyzerTest.php
index 86c6ba29..f3baef85 100644
--- a/tests/Drivers/Gd/Analyzers/PixelColorAnalyzerTest.php
+++ b/tests/Drivers/Gd/Analyzers/PixelColorAnalyzerTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Analyzers;
 
 use Intervention\Image\Analyzers\PixelColorsAnalyzer;
diff --git a/tests/Drivers/Gd/Analyzers/ResolutionAnalyzerTest.php b/tests/Drivers/Gd/Analyzers/ResolutionAnalyzerTest.php
index b424ed77..4b82c0f0 100644
--- a/tests/Drivers/Gd/Analyzers/ResolutionAnalyzerTest.php
+++ b/tests/Drivers/Gd/Analyzers/ResolutionAnalyzerTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Analyzers;
 
 use Intervention\Image\Analyzers\ResolutionAnalyzer;
diff --git a/tests/Drivers/Gd/Analyzers/WidthAnalyzerTest.php b/tests/Drivers/Gd/Analyzers/WidthAnalyzerTest.php
index d4fe8bf5..9ec6e482 100644
--- a/tests/Drivers/Gd/Analyzers/WidthAnalyzerTest.php
+++ b/tests/Drivers/Gd/Analyzers/WidthAnalyzerTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Analyzers;
 
 use Intervention\Image\Analyzers\WidthAnalyzer;
diff --git a/tests/Drivers/Gd/ClonerTest.php b/tests/Drivers/Gd/ClonerTest.php
index 7c25a6e6..fa4bbb00 100644
--- a/tests/Drivers/Gd/ClonerTest.php
+++ b/tests/Drivers/Gd/ClonerTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd;
 
 use Intervention\Image\Colors\Rgb\Color;
diff --git a/tests/Drivers/Gd/CoreTest.php b/tests/Drivers/Gd/CoreTest.php
index 14c5b6e6..802b05d3 100644
--- a/tests/Drivers/Gd/CoreTest.php
+++ b/tests/Drivers/Gd/CoreTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd;
 
 use GdImage;
diff --git a/tests/Drivers/Gd/Decoders/Base64ImageDecoderTest.php b/tests/Drivers/Gd/Decoders/Base64ImageDecoderTest.php
index a5e186bc..643c84ac 100644
--- a/tests/Drivers/Gd/Decoders/Base64ImageDecoderTest.php
+++ b/tests/Drivers/Gd/Decoders/Base64ImageDecoderTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Decoders;
 
 use Intervention\Image\Drivers\Gd\Decoders\Base64ImageDecoder;
diff --git a/tests/Drivers/Gd/Decoders/BinaryImageDecoderTest.php b/tests/Drivers/Gd/Decoders/BinaryImageDecoderTest.php
index 609bc30f..fd443853 100644
--- a/tests/Drivers/Gd/Decoders/BinaryImageDecoderTest.php
+++ b/tests/Drivers/Gd/Decoders/BinaryImageDecoderTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Decoders;
 
 use Intervention\Image\Drivers\Gd\Decoders\BinaryImageDecoder;
diff --git a/tests/Drivers/Gd/Decoders/DataUriImageDecoderTest.php b/tests/Drivers/Gd/Decoders/DataUriImageDecoderTest.php
index e4d86edb..803cbd62 100644
--- a/tests/Drivers/Gd/Decoders/DataUriImageDecoderTest.php
+++ b/tests/Drivers/Gd/Decoders/DataUriImageDecoderTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Decoders;
 
 use Intervention\Image\Drivers\Gd\Decoders\DataUriImageDecoder;
diff --git a/tests/Drivers/Gd/Decoders/FilePathImageDecoderTest.php b/tests/Drivers/Gd/Decoders/FilePathImageDecoderTest.php
index b24cea6b..fa403387 100644
--- a/tests/Drivers/Gd/Decoders/FilePathImageDecoderTest.php
+++ b/tests/Drivers/Gd/Decoders/FilePathImageDecoderTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Decoders;
 
 use Intervention\Image\Drivers\Gd\Decoders\FilePathImageDecoder;
diff --git a/tests/Drivers/Gd/Decoders/FilePointerImageDecoderTest.php b/tests/Drivers/Gd/Decoders/FilePointerImageDecoderTest.php
index 566b8f77..7bcbd1d7 100644
--- a/tests/Drivers/Gd/Decoders/FilePointerImageDecoderTest.php
+++ b/tests/Drivers/Gd/Decoders/FilePointerImageDecoderTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Decoders;
 
 use Intervention\Image\Drivers\Gd\Decoders\FilePointerImageDecoder;
diff --git a/tests/Drivers/Gd/Decoders/ImageObjectDecoderTest.php b/tests/Drivers/Gd/Decoders/ImageObjectDecoderTest.php
index 5cd03ff2..44210f0c 100644
--- a/tests/Drivers/Gd/Decoders/ImageObjectDecoderTest.php
+++ b/tests/Drivers/Gd/Decoders/ImageObjectDecoderTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Decoders;
 
 use Intervention\Image\Drivers\Gd\Decoders\ImageObjectDecoder;
diff --git a/tests/Drivers/Gd/Decoders/SplFileInfoImageDecoder.php b/tests/Drivers/Gd/Decoders/SplFileInfoImageDecoder.php
index 241fbf10..bfe286d0 100644
--- a/tests/Drivers/Gd/Decoders/SplFileInfoImageDecoder.php
+++ b/tests/Drivers/Gd/Decoders/SplFileInfoImageDecoder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Decoders;
 
 use Intervention\Image\Drivers\Gd\Decoders\SplFileInfoImageDecoder;
diff --git a/tests/Drivers/Gd/DriverTest.php b/tests/Drivers/Gd/DriverTest.php
index 946a32fb..ab3af1e2 100644
--- a/tests/Drivers/Gd/DriverTest.php
+++ b/tests/Drivers/Gd/DriverTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd;
 
 use Intervention\Image\Drivers\Gd\Driver;
diff --git a/tests/Drivers/Gd/Encoders/AvifEncoderTest.php b/tests/Drivers/Gd/Encoders/AvifEncoderTest.php
index 60daea50..7f134be8 100644
--- a/tests/Drivers/Gd/Encoders/AvifEncoderTest.php
+++ b/tests/Drivers/Gd/Encoders/AvifEncoderTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Encoders;
 
 use Intervention\Image\Drivers\Gd\Core;
diff --git a/tests/Drivers/Gd/Encoders/BmpEncoderTest.php b/tests/Drivers/Gd/Encoders/BmpEncoderTest.php
index 5fcf32f0..af371e99 100644
--- a/tests/Drivers/Gd/Encoders/BmpEncoderTest.php
+++ b/tests/Drivers/Gd/Encoders/BmpEncoderTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Encoders;
 
 use Intervention\Image\Drivers\Gd\Core;
diff --git a/tests/Drivers/Gd/Encoders/GifEncoderTest.php b/tests/Drivers/Gd/Encoders/GifEncoderTest.php
index 3f2aa3eb..2ba7d2a4 100644
--- a/tests/Drivers/Gd/Encoders/GifEncoderTest.php
+++ b/tests/Drivers/Gd/Encoders/GifEncoderTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Encoders;
 
 use Intervention\Image\Drivers\Gd\Core;
diff --git a/tests/Drivers/Gd/Encoders/JpegEncoderTest.php b/tests/Drivers/Gd/Encoders/JpegEncoderTest.php
index dc30dc50..96597be8 100644
--- a/tests/Drivers/Gd/Encoders/JpegEncoderTest.php
+++ b/tests/Drivers/Gd/Encoders/JpegEncoderTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Encoders;
 
 use Intervention\Image\Drivers\Gd\Core;
diff --git a/tests/Drivers/Gd/Encoders/PngEncoderTest.php b/tests/Drivers/Gd/Encoders/PngEncoderTest.php
index 5a8cc7b1..cbd10d9d 100644
--- a/tests/Drivers/Gd/Encoders/PngEncoderTest.php
+++ b/tests/Drivers/Gd/Encoders/PngEncoderTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Encoders;
 
 use Intervention\Image\Drivers\Gd\Core;
diff --git a/tests/Drivers/Gd/FrameTest.php b/tests/Drivers/Gd/FrameTest.php
index e95d45ea..08409a63 100644
--- a/tests/Drivers/Gd/FrameTest.php
+++ b/tests/Drivers/Gd/FrameTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd;
 
 use GdImage;
diff --git a/tests/Drivers/Gd/ImageTest.php b/tests/Drivers/Gd/ImageTest.php
index bd9a3667..3e6ea116 100644
--- a/tests/Drivers/Gd/ImageTest.php
+++ b/tests/Drivers/Gd/ImageTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd;
 
 use Intervention\Image\Analyzers\WidthAnalyzer;
@@ -276,8 +278,8 @@ class ImageTest extends TestCase
 
     public function testToJpeg(): void
     {
-        $this->assertMediaType('image/jpeg', $this->image->toJpeg());
-        $this->assertMediaType('image/jpeg', $this->image->toJpg());
+        $this->assertMediaType('image/jpeg', (string) $this->image->toJpeg());
+        $this->assertMediaType('image/jpeg', (string) $this->image->toJpg());
     }
 
     public function testToJpeg2000(): void
@@ -288,28 +290,28 @@ class ImageTest extends TestCase
 
     public function testToPng(): void
     {
-        $this->assertMediaType('image/png', $this->image->toPng());
+        $this->assertMediaType('image/png', (string) $this->image->toPng());
     }
 
     public function testToGif(): void
     {
-        $this->assertMediaType('image/gif', $this->image->toGif());
+        $this->assertMediaType('image/gif', (string) $this->image->toGif());
     }
 
     public function testToWebp(): void
     {
-        $this->assertMediaType('image/webp', $this->image->toWebp());
+        $this->assertMediaType('image/webp', (string) $this->image->toWebp());
     }
 
     public function testToBitmap(): void
     {
-        $this->assertMediaType('image/x-ms-bmp', $this->image->toBitmap());
-        $this->assertMediaType('image/x-ms-bmp', $this->image->toBmp());
+        $this->assertMediaType('image/x-ms-bmp', (string) $this->image->toBitmap());
+        $this->assertMediaType('image/x-ms-bmp', (string) $this->image->toBmp());
     }
 
     public function testToAvif(): void
     {
-        $this->assertMediaType('image/avif', $this->image->toAvif());
+        $this->assertMediaType('image/avif', (string) $this->image->toAvif());
     }
 
     public function testToTiff(): void
diff --git a/tests/Drivers/Gd/InputHandlerTest.php b/tests/Drivers/Gd/InputHandlerTest.php
index 4e8ca18c..be376803 100644
--- a/tests/Drivers/Gd/InputHandlerTest.php
+++ b/tests/Drivers/Gd/InputHandlerTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd;
 
 use Intervention\Image\Colors\Cmyk\Color as CmykColor;
diff --git a/tests/Drivers/Gd/Modifiers/BlurModifierTest.php b/tests/Drivers/Gd/Modifiers/BlurModifierTest.php
index 54ecf532..ea5d8ace 100644
--- a/tests/Drivers/Gd/Modifiers/BlurModifierTest.php
+++ b/tests/Drivers/Gd/Modifiers/BlurModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Modifiers\BlurModifier;
diff --git a/tests/Drivers/Gd/Modifiers/BrightnessModifierTest.php b/tests/Drivers/Gd/Modifiers/BrightnessModifierTest.php
index 01dbb38d..5a206175 100644
--- a/tests/Drivers/Gd/Modifiers/BrightnessModifierTest.php
+++ b/tests/Drivers/Gd/Modifiers/BrightnessModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Modifiers\BrightnessModifier;
diff --git a/tests/Drivers/Gd/Modifiers/ColorizeModifierTest.php b/tests/Drivers/Gd/Modifiers/ColorizeModifierTest.php
index ea9c2e02..b8ad31fc 100644
--- a/tests/Drivers/Gd/Modifiers/ColorizeModifierTest.php
+++ b/tests/Drivers/Gd/Modifiers/ColorizeModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Modifiers\ColorizeModifier;
diff --git a/tests/Drivers/Gd/Modifiers/ContainModifierTest.php b/tests/Drivers/Gd/Modifiers/ContainModifierTest.php
index f1486d46..37866731 100644
--- a/tests/Drivers/Gd/Modifiers/ContainModifierTest.php
+++ b/tests/Drivers/Gd/Modifiers/ContainModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Modifiers\ContainModifier;
diff --git a/tests/Drivers/Gd/Modifiers/ContrastModifierTest.php b/tests/Drivers/Gd/Modifiers/ContrastModifierTest.php
index 3b8239f8..a87be687 100644
--- a/tests/Drivers/Gd/Modifiers/ContrastModifierTest.php
+++ b/tests/Drivers/Gd/Modifiers/ContrastModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Modifiers\ContrastModifier;
diff --git a/tests/Drivers/Gd/Modifiers/CoverModifierTest.php b/tests/Drivers/Gd/Modifiers/CoverModifierTest.php
index ba84ccc5..a5d71564 100644
--- a/tests/Drivers/Gd/Modifiers/CoverModifierTest.php
+++ b/tests/Drivers/Gd/Modifiers/CoverModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Modifiers\CoverModifier;
diff --git a/tests/Drivers/Gd/Modifiers/CropModifierTest.php b/tests/Drivers/Gd/Modifiers/CropModifierTest.php
index d8a388b7..b84ae67d 100644
--- a/tests/Drivers/Gd/Modifiers/CropModifierTest.php
+++ b/tests/Drivers/Gd/Modifiers/CropModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Modifiers\CropModifier;
diff --git a/tests/Drivers/Gd/Modifiers/DrawEllipseModiferTest.php b/tests/Drivers/Gd/Modifiers/DrawEllipseModiferTest.php
index 07ee0758..de9d68e4 100644
--- a/tests/Drivers/Gd/Modifiers/DrawEllipseModiferTest.php
+++ b/tests/Drivers/Gd/Modifiers/DrawEllipseModiferTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Modifiers\DrawEllipseModifier;
diff --git a/tests/Drivers/Gd/Modifiers/DrawLineModiferTest.php b/tests/Drivers/Gd/Modifiers/DrawLineModiferTest.php
index 9402209f..3757d489 100644
--- a/tests/Drivers/Gd/Modifiers/DrawLineModiferTest.php
+++ b/tests/Drivers/Gd/Modifiers/DrawLineModiferTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Modifiers\DrawLineModifier;
diff --git a/tests/Drivers/Gd/Modifiers/DrawPixelModifierTest.php b/tests/Drivers/Gd/Modifiers/DrawPixelModifierTest.php
index 55931e06..43a67c89 100644
--- a/tests/Drivers/Gd/Modifiers/DrawPixelModifierTest.php
+++ b/tests/Drivers/Gd/Modifiers/DrawPixelModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Modifiers\DrawPixelModifier;
diff --git a/tests/Drivers/Gd/Modifiers/DrawPolygonModifierTest.php b/tests/Drivers/Gd/Modifiers/DrawPolygonModifierTest.php
index a1bd6059..76d7d77b 100644
--- a/tests/Drivers/Gd/Modifiers/DrawPolygonModifierTest.php
+++ b/tests/Drivers/Gd/Modifiers/DrawPolygonModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Modifiers\DrawPolygonModifier;
diff --git a/tests/Drivers/Gd/Modifiers/DrawRectangleModifierTest.php b/tests/Drivers/Gd/Modifiers/DrawRectangleModifierTest.php
index 517eb527..5f3a1dff 100644
--- a/tests/Drivers/Gd/Modifiers/DrawRectangleModifierTest.php
+++ b/tests/Drivers/Gd/Modifiers/DrawRectangleModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Modifiers\DrawRectangleModifier;
diff --git a/tests/Drivers/Gd/Modifiers/FillModifierTest.php b/tests/Drivers/Gd/Modifiers/FillModifierTest.php
index 4bc29edc..f16f5de5 100644
--- a/tests/Drivers/Gd/Modifiers/FillModifierTest.php
+++ b/tests/Drivers/Gd/Modifiers/FillModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Colors\Rgb\Color;
diff --git a/tests/Drivers/Gd/Modifiers/FlipFlopModifierTest.php b/tests/Drivers/Gd/Modifiers/FlipFlopModifierTest.php
index 2bed860c..746ebcab 100644
--- a/tests/Drivers/Gd/Modifiers/FlipFlopModifierTest.php
+++ b/tests/Drivers/Gd/Modifiers/FlipFlopModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Modifiers\FlipModifier;
diff --git a/tests/Drivers/Gd/Modifiers/GammaModifierTest.php b/tests/Drivers/Gd/Modifiers/GammaModifierTest.php
index b017b784..87c6b9be 100644
--- a/tests/Drivers/Gd/Modifiers/GammaModifierTest.php
+++ b/tests/Drivers/Gd/Modifiers/GammaModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Modifiers\GammaModifier;
diff --git a/tests/Drivers/Gd/Modifiers/GreyscaleModifierTest.php b/tests/Drivers/Gd/Modifiers/GreyscaleModifierTest.php
index 68fe7a53..a9faa6bb 100644
--- a/tests/Drivers/Gd/Modifiers/GreyscaleModifierTest.php
+++ b/tests/Drivers/Gd/Modifiers/GreyscaleModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Modifiers\GreyscaleModifier;
diff --git a/tests/Drivers/Gd/Modifiers/InvertModifierTest.php b/tests/Drivers/Gd/Modifiers/InvertModifierTest.php
index 581f12d3..25eeced7 100644
--- a/tests/Drivers/Gd/Modifiers/InvertModifierTest.php
+++ b/tests/Drivers/Gd/Modifiers/InvertModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Modifiers\InvertModifier;
diff --git a/tests/Drivers/Gd/Modifiers/PixelateModifierTest.php b/tests/Drivers/Gd/Modifiers/PixelateModifierTest.php
index 9ddb2c2b..4f45e07e 100644
--- a/tests/Drivers/Gd/Modifiers/PixelateModifierTest.php
+++ b/tests/Drivers/Gd/Modifiers/PixelateModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Modifiers\PixelateModifier;
diff --git a/tests/Drivers/Gd/Modifiers/PlaceModifierTest.php b/tests/Drivers/Gd/Modifiers/PlaceModifierTest.php
index ddbf05ad..8267c2ba 100644
--- a/tests/Drivers/Gd/Modifiers/PlaceModifierTest.php
+++ b/tests/Drivers/Gd/Modifiers/PlaceModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Modifiers\PlaceModifier;
diff --git a/tests/Drivers/Gd/Modifiers/QuantizeColorsModifierTest.php b/tests/Drivers/Gd/Modifiers/QuantizeColorsModifierTest.php
index 64a7fdb6..8d0435ec 100644
--- a/tests/Drivers/Gd/Modifiers/QuantizeColorsModifierTest.php
+++ b/tests/Drivers/Gd/Modifiers/QuantizeColorsModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Interfaces\ImageInterface;
diff --git a/tests/Drivers/Gd/Modifiers/RemoveAnimationModifierTest.php b/tests/Drivers/Gd/Modifiers/RemoveAnimationModifierTest.php
index 105120a9..f46950da 100644
--- a/tests/Drivers/Gd/Modifiers/RemoveAnimationModifierTest.php
+++ b/tests/Drivers/Gd/Modifiers/RemoveAnimationModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Modifiers\RemoveAnimationModifier;
diff --git a/tests/Drivers/Gd/Modifiers/ResizeCanvasModifierTest.php b/tests/Drivers/Gd/Modifiers/ResizeCanvasModifierTest.php
index d3f7daa1..68592094 100644
--- a/tests/Drivers/Gd/Modifiers/ResizeCanvasModifierTest.php
+++ b/tests/Drivers/Gd/Modifiers/ResizeCanvasModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Modifiers\ResizeCanvasModifier;
diff --git a/tests/Drivers/Gd/Modifiers/ResizeCanvasRelativeModifierTest.php b/tests/Drivers/Gd/Modifiers/ResizeCanvasRelativeModifierTest.php
index cbd1658d..e1306f55 100644
--- a/tests/Drivers/Gd/Modifiers/ResizeCanvasRelativeModifierTest.php
+++ b/tests/Drivers/Gd/Modifiers/ResizeCanvasRelativeModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Modifiers\ResizeCanvasRelativeModifier;
diff --git a/tests/Drivers/Gd/Modifiers/ResizeModifierTest.php b/tests/Drivers/Gd/Modifiers/ResizeModifierTest.php
index 8dd1ae91..dc75de07 100644
--- a/tests/Drivers/Gd/Modifiers/ResizeModifierTest.php
+++ b/tests/Drivers/Gd/Modifiers/ResizeModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Modifiers\ResizeModifier;
diff --git a/tests/Drivers/Gd/Modifiers/ResolutionModifierTest.php b/tests/Drivers/Gd/Modifiers/ResolutionModifierTest.php
index 5244a2e7..9cda784c 100644
--- a/tests/Drivers/Gd/Modifiers/ResolutionModifierTest.php
+++ b/tests/Drivers/Gd/Modifiers/ResolutionModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Modifiers\ResolutionModifier;
diff --git a/tests/Drivers/Gd/Modifiers/RotateModifierTest.php b/tests/Drivers/Gd/Modifiers/RotateModifierTest.php
index 1799d813..2f5070a6 100644
--- a/tests/Drivers/Gd/Modifiers/RotateModifierTest.php
+++ b/tests/Drivers/Gd/Modifiers/RotateModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Modifiers\RotateModifier;
diff --git a/tests/Drivers/Gd/Modifiers/SharpenModifierTest.php b/tests/Drivers/Gd/Modifiers/SharpenModifierTest.php
index 1c119f9f..ff4df9da 100644
--- a/tests/Drivers/Gd/Modifiers/SharpenModifierTest.php
+++ b/tests/Drivers/Gd/Modifiers/SharpenModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Gd\Modifiers;
 
 use Intervention\Image\Modifiers\SharpenModifier;
diff --git a/tests/Drivers/Imagick/Analyzers/ColorspaceAnalyzerTest.php b/tests/Drivers/Imagick/Analyzers/ColorspaceAnalyzerTest.php
index b2151cc9..cdf15633 100644
--- a/tests/Drivers/Imagick/Analyzers/ColorspaceAnalyzerTest.php
+++ b/tests/Drivers/Imagick/Analyzers/ColorspaceAnalyzerTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Analyzers;
 
 use Intervention\Image\Analyzers\ColorspaceAnalyzer;
diff --git a/tests/Drivers/Imagick/Analyzers/HeightAnalyzerTest.php b/tests/Drivers/Imagick/Analyzers/HeightAnalyzerTest.php
index d68fada7..47e520c6 100644
--- a/tests/Drivers/Imagick/Analyzers/HeightAnalyzerTest.php
+++ b/tests/Drivers/Imagick/Analyzers/HeightAnalyzerTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Analyzers;
 
 use Intervention\Image\Analyzers\HeightAnalyzer;
diff --git a/tests/Drivers/Imagick/Analyzers/PixelColorAnalyzer.php b/tests/Drivers/Imagick/Analyzers/PixelColorAnalyzer.php
index 3fc922b7..21396ab2 100644
--- a/tests/Drivers/Imagick/Analyzers/PixelColorAnalyzer.php
+++ b/tests/Drivers/Imagick/Analyzers/PixelColorAnalyzer.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Analyzers;
 
 use Intervention\Image\Analyzers\PixelColorAnalyzer;
diff --git a/tests/Drivers/Imagick/Analyzers/PixelColorAnalyzerTest.php b/tests/Drivers/Imagick/Analyzers/PixelColorAnalyzerTest.php
index c1f6afd6..13eb9baf 100644
--- a/tests/Drivers/Imagick/Analyzers/PixelColorAnalyzerTest.php
+++ b/tests/Drivers/Imagick/Analyzers/PixelColorAnalyzerTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Analyzers;
 
 use Intervention\Image\Analyzers\PixelColorsAnalyzer;
diff --git a/tests/Drivers/Imagick/Analyzers/ProfileAnalyzerTest.php b/tests/Drivers/Imagick/Analyzers/ProfileAnalyzerTest.php
index cdb78ed8..6bee2eba 100644
--- a/tests/Drivers/Imagick/Analyzers/ProfileAnalyzerTest.php
+++ b/tests/Drivers/Imagick/Analyzers/ProfileAnalyzerTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Analyzers;
 
 use Intervention\Image\Analyzers\ProfileAnalyzer;
diff --git a/tests/Drivers/Imagick/Analyzers/ResolutionAnalyzerTest.php b/tests/Drivers/Imagick/Analyzers/ResolutionAnalyzerTest.php
index 51a44b5e..5275c729 100644
--- a/tests/Drivers/Imagick/Analyzers/ResolutionAnalyzerTest.php
+++ b/tests/Drivers/Imagick/Analyzers/ResolutionAnalyzerTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Analyzers;
 
 use Intervention\Image\Analyzers\ResolutionAnalyzer;
diff --git a/tests/Drivers/Imagick/Analyzers/WidthAnalyzerTest.php b/tests/Drivers/Imagick/Analyzers/WidthAnalyzerTest.php
index fd30ff86..a8187232 100644
--- a/tests/Drivers/Imagick/Analyzers/WidthAnalyzerTest.php
+++ b/tests/Drivers/Imagick/Analyzers/WidthAnalyzerTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Analyzers;
 
 use Intervention\Image\Analyzers\WidthAnalyzer;
diff --git a/tests/Drivers/Imagick/CoreTest.php b/tests/Drivers/Imagick/CoreTest.php
index 3ecef822..902d18cd 100644
--- a/tests/Drivers/Imagick/CoreTest.php
+++ b/tests/Drivers/Imagick/CoreTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick;
 
 use Imagick;
diff --git a/tests/Drivers/Imagick/Decoders/Base64ImageDecoderTest.php b/tests/Drivers/Imagick/Decoders/Base64ImageDecoderTest.php
index 0820917c..dbf36a5f 100644
--- a/tests/Drivers/Imagick/Decoders/Base64ImageDecoderTest.php
+++ b/tests/Drivers/Imagick/Decoders/Base64ImageDecoderTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Decoders;
 
 use Intervention\Image\Drivers\Imagick\Decoders\Base64ImageDecoder;
diff --git a/tests/Drivers/Imagick/Decoders/BinaryImageDecoderTest.php b/tests/Drivers/Imagick/Decoders/BinaryImageDecoderTest.php
index c58c0412..3fe4713c 100644
--- a/tests/Drivers/Imagick/Decoders/BinaryImageDecoderTest.php
+++ b/tests/Drivers/Imagick/Decoders/BinaryImageDecoderTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Decoders;
 
 use Intervention\Image\Colors\Cmyk\Colorspace as CmykColorspace;
diff --git a/tests/Drivers/Imagick/Decoders/DataUriImageDecoderTest.php b/tests/Drivers/Imagick/Decoders/DataUriImageDecoderTest.php
index df55580b..a14ee580 100644
--- a/tests/Drivers/Imagick/Decoders/DataUriImageDecoderTest.php
+++ b/tests/Drivers/Imagick/Decoders/DataUriImageDecoderTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Decoders;
 
 use Intervention\Image\Drivers\Imagick\Decoders\DataUriImageDecoder;
diff --git a/tests/Drivers/Imagick/Decoders/FilePathImageDecoderTest.php b/tests/Drivers/Imagick/Decoders/FilePathImageDecoderTest.php
index 1501ac8b..ae470096 100644
--- a/tests/Drivers/Imagick/Decoders/FilePathImageDecoderTest.php
+++ b/tests/Drivers/Imagick/Decoders/FilePathImageDecoderTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Decoders;
 
 use Intervention\Image\Drivers\Imagick\Decoders\FilePathImageDecoder;
diff --git a/tests/Drivers/Imagick/Decoders/FilePointerImageDecoderTest.php b/tests/Drivers/Imagick/Decoders/FilePointerImageDecoderTest.php
index e88e73b8..7b823897 100644
--- a/tests/Drivers/Imagick/Decoders/FilePointerImageDecoderTest.php
+++ b/tests/Drivers/Imagick/Decoders/FilePointerImageDecoderTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Decoders;
 
 use Intervention\Image\Drivers\Imagick\Decoders\FilePointerImageDecoder;
diff --git a/tests/Drivers/Imagick/Decoders/ImageObjectDecoderTest.php b/tests/Drivers/Imagick/Decoders/ImageObjectDecoderTest.php
index 55fbae11..60857a29 100644
--- a/tests/Drivers/Imagick/Decoders/ImageObjectDecoderTest.php
+++ b/tests/Drivers/Imagick/Decoders/ImageObjectDecoderTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Decoders;
 
 use Intervention\Image\Drivers\Imagick\Decoders\ImageObjectDecoder;
diff --git a/tests/Drivers/Imagick/Decoders/SplFileInfoDecoderTest.php b/tests/Drivers/Imagick/Decoders/SplFileInfoDecoderTest.php
index 34df14c6..8f3c9378 100644
--- a/tests/Drivers/Imagick/Decoders/SplFileInfoDecoderTest.php
+++ b/tests/Drivers/Imagick/Decoders/SplFileInfoDecoderTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Decoders;
 
 use Intervention\Image\Drivers\Imagick\Decoders\SplFileInfoImageDecoder;
diff --git a/tests/Drivers/Imagick/DriverTest.php b/tests/Drivers/Imagick/DriverTest.php
index e04a7655..36b51a40 100644
--- a/tests/Drivers/Imagick/DriverTest.php
+++ b/tests/Drivers/Imagick/DriverTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick;
 
 use Intervention\Image\Drivers\Imagick\Driver;
diff --git a/tests/Drivers/Imagick/Encoders/AvifEncoderTest.php b/tests/Drivers/Imagick/Encoders/AvifEncoderTest.php
index 3923a7b1..69f7e43e 100644
--- a/tests/Drivers/Imagick/Encoders/AvifEncoderTest.php
+++ b/tests/Drivers/Imagick/Encoders/AvifEncoderTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Encoders;
 
 use Imagick;
diff --git a/tests/Drivers/Imagick/Encoders/BmpEncoderTest.php b/tests/Drivers/Imagick/Encoders/BmpEncoderTest.php
index 9bb3da65..a3080919 100644
--- a/tests/Drivers/Imagick/Encoders/BmpEncoderTest.php
+++ b/tests/Drivers/Imagick/Encoders/BmpEncoderTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Encoders;
 
 use Imagick;
diff --git a/tests/Drivers/Imagick/Encoders/GifEncoderTest.php b/tests/Drivers/Imagick/Encoders/GifEncoderTest.php
index e0c1e51f..3961dd98 100644
--- a/tests/Drivers/Imagick/Encoders/GifEncoderTest.php
+++ b/tests/Drivers/Imagick/Encoders/GifEncoderTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Encoders;
 
 use Imagick;
diff --git a/tests/Drivers/Imagick/Encoders/Jpeg2000EncoderTest.php b/tests/Drivers/Imagick/Encoders/Jpeg2000EncoderTest.php
index 3cc6ceb5..0cca7ca8 100644
--- a/tests/Drivers/Imagick/Encoders/Jpeg2000EncoderTest.php
+++ b/tests/Drivers/Imagick/Encoders/Jpeg2000EncoderTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Encoders;
 
 use Imagick;
diff --git a/tests/Drivers/Imagick/Encoders/JpegEncoderTest.php b/tests/Drivers/Imagick/Encoders/JpegEncoderTest.php
index 5b8dccdd..077d46be 100644
--- a/tests/Drivers/Imagick/Encoders/JpegEncoderTest.php
+++ b/tests/Drivers/Imagick/Encoders/JpegEncoderTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Encoders;
 
 use Imagick;
diff --git a/tests/Drivers/Imagick/FrameTest.php b/tests/Drivers/Imagick/FrameTest.php
index 8e04ddaf..c4ed6ac7 100644
--- a/tests/Drivers/Imagick/FrameTest.php
+++ b/tests/Drivers/Imagick/FrameTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick;
 
 use Imagick;
diff --git a/tests/Drivers/Imagick/ImageTest.php b/tests/Drivers/Imagick/ImageTest.php
index b2254039..adbabd4e 100644
--- a/tests/Drivers/Imagick/ImageTest.php
+++ b/tests/Drivers/Imagick/ImageTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick;
 
 use Imagick;
@@ -269,51 +271,51 @@ class ImageTest extends TestCase
 
     public function testToJpeg(): void
     {
-        $this->assertMediaType('image/jpeg', $this->image->toJpeg());
-        $this->assertMediaType('image/jpeg', $this->image->toJpg());
+        $this->assertMediaType('image/jpeg', (string) $this->image->toJpeg());
+        $this->assertMediaType('image/jpeg', (string) $this->image->toJpg());
     }
 
     public function testToJpeg2000(): void
     {
-        $this->assertMediaType('image/jp2', $this->image->toJpeg2000());
-        $this->assertMediaType('image/jp2', $this->image->toJp2());
+        $this->assertMediaType('image/jp2', (string) $this->image->toJpeg2000());
+        $this->assertMediaType('image/jp2', (string) $this->image->toJp2());
     }
 
     public function testToPng(): void
     {
-        $this->assertMediaType('image/png', $this->image->toPng());
+        $this->assertMediaType('image/png', (string) $this->image->toPng());
     }
 
     public function testToGif(): void
     {
-        $this->assertMediaType('image/gif', $this->image->toGif());
+        $this->assertMediaType('image/gif', (string) $this->image->toGif());
     }
 
     public function testToWebp(): void
     {
-        $this->assertMediaType('image/webp', $this->image->toWebp());
+        $this->assertMediaType('image/webp', (string) $this->image->toWebp());
     }
 
     public function testToBitmap(): void
     {
-        $this->assertMediaType('image/x-ms-bmp', $this->image->toBitmap());
-        $this->assertMediaType('image/x-ms-bmp', $this->image->toBmp());
+        $this->assertMediaType('image/x-ms-bmp', (string) $this->image->toBitmap());
+        $this->assertMediaType('image/x-ms-bmp', (string) $this->image->toBmp());
     }
 
     public function testToAvif(): void
     {
-        $this->assertMediaType('image/avif', $this->image->toAvif());
+        $this->assertMediaType('image/avif', (string) $this->image->toAvif());
     }
 
     public function testToTiff(): void
     {
-        $this->assertMediaType('image/tiff', $this->image->toTiff());
-        $this->assertMediaType('image/tiff', $this->image->toTif());
+        $this->assertMediaType('image/tiff', (string) $this->image->toTiff());
+        $this->assertMediaType('image/tiff', (string) $this->image->toTif());
     }
 
     public function testToHeic(): void
     {
-        $this->assertMediaType('image/heic', $this->image->toHeic());
+        $this->assertMediaType('image/heic', (string) $this->image->toHeic());
     }
 
     public function testInvert(): void
diff --git a/tests/Drivers/Imagick/InputHandlerTest.php b/tests/Drivers/Imagick/InputHandlerTest.php
index ce3b3ed4..c2ee6f10 100644
--- a/tests/Drivers/Imagick/InputHandlerTest.php
+++ b/tests/Drivers/Imagick/InputHandlerTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick;
 
 use Intervention\Image\Colors\Cmyk\Color as CmykColor;
diff --git a/tests/Drivers/Imagick/Modifiers/BlurModifierTest.php b/tests/Drivers/Imagick/Modifiers/BlurModifierTest.php
index 4df25028..a2d3a6a8 100644
--- a/tests/Drivers/Imagick/Modifiers/BlurModifierTest.php
+++ b/tests/Drivers/Imagick/Modifiers/BlurModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Modifiers\BlurModifier;
diff --git a/tests/Drivers/Imagick/Modifiers/BrightnessModifierTest.php b/tests/Drivers/Imagick/Modifiers/BrightnessModifierTest.php
index f11fb811..b5184ed2 100644
--- a/tests/Drivers/Imagick/Modifiers/BrightnessModifierTest.php
+++ b/tests/Drivers/Imagick/Modifiers/BrightnessModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Modifiers\BrightnessModifier;
diff --git a/tests/Drivers/Imagick/Modifiers/ColorizeModifierTest.php b/tests/Drivers/Imagick/Modifiers/ColorizeModifierTest.php
index 23071a94..5426615e 100644
--- a/tests/Drivers/Imagick/Modifiers/ColorizeModifierTest.php
+++ b/tests/Drivers/Imagick/Modifiers/ColorizeModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Modifiers\ColorizeModifier;
diff --git a/tests/Drivers/Imagick/Modifiers/ContainModifierTest.php b/tests/Drivers/Imagick/Modifiers/ContainModifierTest.php
index a5ba90c0..e7701644 100644
--- a/tests/Drivers/Imagick/Modifiers/ContainModifierTest.php
+++ b/tests/Drivers/Imagick/Modifiers/ContainModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Modifiers\ContainModifier;
diff --git a/tests/Drivers/Imagick/Modifiers/ContrastModifierTest.php b/tests/Drivers/Imagick/Modifiers/ContrastModifierTest.php
index 8feed458..b89472f0 100644
--- a/tests/Drivers/Imagick/Modifiers/ContrastModifierTest.php
+++ b/tests/Drivers/Imagick/Modifiers/ContrastModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Modifiers\ContrastModifier;
diff --git a/tests/Drivers/Imagick/Modifiers/CoverModifierTest.php b/tests/Drivers/Imagick/Modifiers/CoverModifierTest.php
index 5976ade0..46ce406e 100644
--- a/tests/Drivers/Imagick/Modifiers/CoverModifierTest.php
+++ b/tests/Drivers/Imagick/Modifiers/CoverModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Modifiers\CoverModifier;
diff --git a/tests/Drivers/Imagick/Modifiers/CropModifierTest.php b/tests/Drivers/Imagick/Modifiers/CropModifierTest.php
index 7c7f38e3..5dec1161 100644
--- a/tests/Drivers/Imagick/Modifiers/CropModifierTest.php
+++ b/tests/Drivers/Imagick/Modifiers/CropModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Modifiers\CropModifier;
diff --git a/tests/Drivers/Imagick/Modifiers/DrawEllipseModifierTest.php b/tests/Drivers/Imagick/Modifiers/DrawEllipseModifierTest.php
index 5df30521..76f790c4 100644
--- a/tests/Drivers/Imagick/Modifiers/DrawEllipseModifierTest.php
+++ b/tests/Drivers/Imagick/Modifiers/DrawEllipseModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Modifiers\DrawEllipseModifier;
diff --git a/tests/Drivers/Imagick/Modifiers/DrawLineModifierTest.php b/tests/Drivers/Imagick/Modifiers/DrawLineModifierTest.php
index 4cae5c0a..5e9199e6 100644
--- a/tests/Drivers/Imagick/Modifiers/DrawLineModifierTest.php
+++ b/tests/Drivers/Imagick/Modifiers/DrawLineModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Modifiers\DrawLineModifier;
diff --git a/tests/Drivers/Imagick/Modifiers/DrawPixelModifierTest.php b/tests/Drivers/Imagick/Modifiers/DrawPixelModifierTest.php
index f156da67..962dccf2 100644
--- a/tests/Drivers/Imagick/Modifiers/DrawPixelModifierTest.php
+++ b/tests/Drivers/Imagick/Modifiers/DrawPixelModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Modifiers\DrawPixelModifier;
diff --git a/tests/Drivers/Imagick/Modifiers/DrawPolygonModifierTest.php b/tests/Drivers/Imagick/Modifiers/DrawPolygonModifierTest.php
index 38c01acd..2699ca0a 100644
--- a/tests/Drivers/Imagick/Modifiers/DrawPolygonModifierTest.php
+++ b/tests/Drivers/Imagick/Modifiers/DrawPolygonModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Modifiers\DrawPolygonModifier;
diff --git a/tests/Drivers/Imagick/Modifiers/DrawRectangleModifierTest.php b/tests/Drivers/Imagick/Modifiers/DrawRectangleModifierTest.php
index 78474b7f..86f255f5 100644
--- a/tests/Drivers/Imagick/Modifiers/DrawRectangleModifierTest.php
+++ b/tests/Drivers/Imagick/Modifiers/DrawRectangleModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Modifiers\DrawRectangleModifier;
diff --git a/tests/Drivers/Imagick/Modifiers/FillModifierTest.php b/tests/Drivers/Imagick/Modifiers/FillModifierTest.php
index c2a369f3..cfc9b73d 100644
--- a/tests/Drivers/Imagick/Modifiers/FillModifierTest.php
+++ b/tests/Drivers/Imagick/Modifiers/FillModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Colors\Rgb\Color;
diff --git a/tests/Drivers/Imagick/Modifiers/FlipFlopModifierTest.php b/tests/Drivers/Imagick/Modifiers/FlipFlopModifierTest.php
index a858c343..7558f3fc 100644
--- a/tests/Drivers/Imagick/Modifiers/FlipFlopModifierTest.php
+++ b/tests/Drivers/Imagick/Modifiers/FlipFlopModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Modifiers\FlipModifier;
diff --git a/tests/Drivers/Imagick/Modifiers/GammaModifierTest.php b/tests/Drivers/Imagick/Modifiers/GammaModifierTest.php
index d51af403..99df34d3 100644
--- a/tests/Drivers/Imagick/Modifiers/GammaModifierTest.php
+++ b/tests/Drivers/Imagick/Modifiers/GammaModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Modifiers\GammaModifier;
diff --git a/tests/Drivers/Imagick/Modifiers/GreyscaleModifierTest.php b/tests/Drivers/Imagick/Modifiers/GreyscaleModifierTest.php
index 16025704..73c17be2 100644
--- a/tests/Drivers/Imagick/Modifiers/GreyscaleModifierTest.php
+++ b/tests/Drivers/Imagick/Modifiers/GreyscaleModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Modifiers\GreyscaleModifier;
diff --git a/tests/Drivers/Imagick/Modifiers/InvertModifierTest.php b/tests/Drivers/Imagick/Modifiers/InvertModifierTest.php
index fa952950..034a777c 100644
--- a/tests/Drivers/Imagick/Modifiers/InvertModifierTest.php
+++ b/tests/Drivers/Imagick/Modifiers/InvertModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Modifiers\InvertModifier;
diff --git a/tests/Drivers/Imagick/Modifiers/PixelateModifierTest.php b/tests/Drivers/Imagick/Modifiers/PixelateModifierTest.php
index 8391df90..b7305e97 100644
--- a/tests/Drivers/Imagick/Modifiers/PixelateModifierTest.php
+++ b/tests/Drivers/Imagick/Modifiers/PixelateModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Modifiers\PixelateModifier;
diff --git a/tests/Drivers/Imagick/Modifiers/PlaceModifierTest.php b/tests/Drivers/Imagick/Modifiers/PlaceModifierTest.php
index edb1f295..005698f2 100644
--- a/tests/Drivers/Imagick/Modifiers/PlaceModifierTest.php
+++ b/tests/Drivers/Imagick/Modifiers/PlaceModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Modifiers\PlaceModifier;
diff --git a/tests/Drivers/Imagick/Modifiers/QuantizeColorsModifierTest.php b/tests/Drivers/Imagick/Modifiers/QuantizeColorsModifierTest.php
index c0bbb2c8..cf0e860b 100644
--- a/tests/Drivers/Imagick/Modifiers/QuantizeColorsModifierTest.php
+++ b/tests/Drivers/Imagick/Modifiers/QuantizeColorsModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Modifiers\QuantizeColorsModifier;
diff --git a/tests/Drivers/Imagick/Modifiers/RemoveAnimationModifierTest.php b/tests/Drivers/Imagick/Modifiers/RemoveAnimationModifierTest.php
index cec0001a..9ca4c126 100644
--- a/tests/Drivers/Imagick/Modifiers/RemoveAnimationModifierTest.php
+++ b/tests/Drivers/Imagick/Modifiers/RemoveAnimationModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Modifiers\RemoveAnimationModifier;
diff --git a/tests/Drivers/Imagick/Modifiers/ResizeCanvasModifierTest.php b/tests/Drivers/Imagick/Modifiers/ResizeCanvasModifierTest.php
index d27bbcdd..fa96f1f4 100644
--- a/tests/Drivers/Imagick/Modifiers/ResizeCanvasModifierTest.php
+++ b/tests/Drivers/Imagick/Modifiers/ResizeCanvasModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Modifiers\ResizeCanvasModifier;
diff --git a/tests/Drivers/Imagick/Modifiers/ResizeCanvasRelativeModifierTest.php b/tests/Drivers/Imagick/Modifiers/ResizeCanvasRelativeModifierTest.php
index bc38caf6..e52285f4 100644
--- a/tests/Drivers/Imagick/Modifiers/ResizeCanvasRelativeModifierTest.php
+++ b/tests/Drivers/Imagick/Modifiers/ResizeCanvasRelativeModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Modifiers\ResizeCanvasRelativeModifier;
diff --git a/tests/Drivers/Imagick/Modifiers/ResizeModifierTest.php b/tests/Drivers/Imagick/Modifiers/ResizeModifierTest.php
index 6113e25e..76beb952 100644
--- a/tests/Drivers/Imagick/Modifiers/ResizeModifierTest.php
+++ b/tests/Drivers/Imagick/Modifiers/ResizeModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Modifiers\ResizeModifier;
diff --git a/tests/Drivers/Imagick/Modifiers/ResolutionModifierTest.php b/tests/Drivers/Imagick/Modifiers/ResolutionModifierTest.php
index f250c49e..6aa74e65 100644
--- a/tests/Drivers/Imagick/Modifiers/ResolutionModifierTest.php
+++ b/tests/Drivers/Imagick/Modifiers/ResolutionModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Modifiers\ResolutionModifier;
diff --git a/tests/Drivers/Imagick/Modifiers/RotateModifierTest.php b/tests/Drivers/Imagick/Modifiers/RotateModifierTest.php
index b15f4f78..a4547b75 100644
--- a/tests/Drivers/Imagick/Modifiers/RotateModifierTest.php
+++ b/tests/Drivers/Imagick/Modifiers/RotateModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Modifiers\RotateModifier;
diff --git a/tests/Drivers/Imagick/Modifiers/SharpenModifierTest.php b/tests/Drivers/Imagick/Modifiers/SharpenModifierTest.php
index 24cfcac7..06ff2f33 100644
--- a/tests/Drivers/Imagick/Modifiers/SharpenModifierTest.php
+++ b/tests/Drivers/Imagick/Modifiers/SharpenModifierTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Drivers\Imagick\Modifiers;
 
 use Intervention\Image\Modifiers\SharpenModifier;
diff --git a/tests/EncodedImageTest.php b/tests/EncodedImageTest.php
index 2cdb9cad..5f5f9758 100644
--- a/tests/EncodedImageTest.php
+++ b/tests/EncodedImageTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests;
 
 use Intervention\Image\EncodedImage;
diff --git a/tests/FileTest.php b/tests/FileTest.php
index 86e8b7d6..4428bd26 100644
--- a/tests/FileTest.php
+++ b/tests/FileTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests;
 
 use Intervention\Image\File;
diff --git a/tests/Geometry/CircleTest.php b/tests/Geometry/CircleTest.php
index 7fbaa1a8..597a4539 100644
--- a/tests/Geometry/CircleTest.php
+++ b/tests/Geometry/CircleTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Geometry;
 
 use Intervention\Image\Geometry\Circle;
diff --git a/tests/Geometry/EllipseTest.php b/tests/Geometry/EllipseTest.php
index 2838b5c3..1cb2bf03 100644
--- a/tests/Geometry/EllipseTest.php
+++ b/tests/Geometry/EllipseTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Geometry;
 
 use Intervention\Image\Geometry\Ellipse;
diff --git a/tests/Geometry/Factories/CircleFactoryTest.php b/tests/Geometry/Factories/CircleFactoryTest.php
index 25419ba6..a9e4fa19 100644
--- a/tests/Geometry/Factories/CircleFactoryTest.php
+++ b/tests/Geometry/Factories/CircleFactoryTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Geometry\Factories;
 
 use Intervention\Image\Geometry\Ellipse;
diff --git a/tests/Geometry/Factories/EllipseFactoryTest.php b/tests/Geometry/Factories/EllipseFactoryTest.php
index 2cc0bb70..43cb04e6 100644
--- a/tests/Geometry/Factories/EllipseFactoryTest.php
+++ b/tests/Geometry/Factories/EllipseFactoryTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Geometry\Factories;
 
 use Intervention\Image\Geometry\Ellipse;
diff --git a/tests/Geometry/Factories/LineFactoryTest.php b/tests/Geometry/Factories/LineFactoryTest.php
index 77512af4..6874dbc4 100644
--- a/tests/Geometry/Factories/LineFactoryTest.php
+++ b/tests/Geometry/Factories/LineFactoryTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Geometry\Factories;
 
 use Intervention\Image\Geometry\Factories\LineFactory;
diff --git a/tests/Geometry/Factories/PolygonFactoryTest.php b/tests/Geometry/Factories/PolygonFactoryTest.php
index 73210f65..8e6a5ec1 100644
--- a/tests/Geometry/Factories/PolygonFactoryTest.php
+++ b/tests/Geometry/Factories/PolygonFactoryTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Geometry\Factories;
 
 use Intervention\Image\Geometry\Factories\PolygonFactory;
diff --git a/tests/Geometry/Factories/RectangleFactoryTest.php b/tests/Geometry/Factories/RectangleFactoryTest.php
index a26289b5..236d0a8a 100644
--- a/tests/Geometry/Factories/RectangleFactoryTest.php
+++ b/tests/Geometry/Factories/RectangleFactoryTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Geometry\Factories;
 
 use Intervention\Image\Geometry\Factories\RectangleFactory;
diff --git a/tests/Geometry/LineTest.php b/tests/Geometry/LineTest.php
index aaf57c84..0e3488dc 100644
--- a/tests/Geometry/LineTest.php
+++ b/tests/Geometry/LineTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Geometry;
 
 use Intervention\Image\Geometry\Line;
diff --git a/tests/Geometry/PixelTest.php b/tests/Geometry/PixelTest.php
index f034abdf..3653e7cb 100644
--- a/tests/Geometry/PixelTest.php
+++ b/tests/Geometry/PixelTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Geometry;
 
 use Intervention\Image\Geometry\Pixel;
diff --git a/tests/Geometry/PointTest.php b/tests/Geometry/PointTest.php
index 7ce5b871..f9655079 100644
--- a/tests/Geometry/PointTest.php
+++ b/tests/Geometry/PointTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Geometry;
 
 use Intervention\Image\Geometry\Point;
diff --git a/tests/Geometry/PolygonTest.php b/tests/Geometry/PolygonTest.php
index 84bf85fb..1d6fc990 100644
--- a/tests/Geometry/PolygonTest.php
+++ b/tests/Geometry/PolygonTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Geometry;
 
 use Intervention\Image\Geometry\{Point, Polygon};
diff --git a/tests/Geometry/RectangleResizerTest.php b/tests/Geometry/RectangleResizerTest.php
index fe7ce1fd..6f54a9f8 100644
--- a/tests/Geometry/RectangleResizerTest.php
+++ b/tests/Geometry/RectangleResizerTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Geometry;
 
 use Intervention\Image\Geometry\Point;
diff --git a/tests/Geometry/RectangleTest.php b/tests/Geometry/RectangleTest.php
index 0118d617..832fe9d8 100644
--- a/tests/Geometry/RectangleTest.php
+++ b/tests/Geometry/RectangleTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Geometry;
 
 use Intervention\Image\Geometry\Point;
diff --git a/tests/Geometry/Traits/HasBackgroundColor.php b/tests/Geometry/Traits/HasBackgroundColor.php
index f26095e4..316ea705 100644
--- a/tests/Geometry/Traits/HasBackgroundColor.php
+++ b/tests/Geometry/Traits/HasBackgroundColor.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Geometry\Traits;
 
 use Intervention\Image\Geometry\Traits\HasBackgroundColor;
diff --git a/tests/Geometry/Traits/HasBorderTest.php b/tests/Geometry/Traits/HasBorderTest.php
index e8749b8f..7218f1a6 100644
--- a/tests/Geometry/Traits/HasBorderTest.php
+++ b/tests/Geometry/Traits/HasBorderTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Geometry\Traits;
 
 use Intervention\Image\Geometry\Traits\HasBorder;
diff --git a/tests/ImageManagerTest.php b/tests/ImageManagerTest.php
index f824bad1..5a60b843 100644
--- a/tests/ImageManagerTest.php
+++ b/tests/ImageManagerTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests;
 
 use Intervention\Image\Decoders\BinaryImageDecoder;
diff --git a/tests/ModifierStackTest.php b/tests/ModifierStackTest.php
index 037d8803..6acb2336 100644
--- a/tests/ModifierStackTest.php
+++ b/tests/ModifierStackTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests;
 
 use Intervention\Image\Modifiers\GreyscaleModifier;
diff --git a/tests/OriginTest.php b/tests/OriginTest.php
index c3374ab9..0ee86e1d 100644
--- a/tests/OriginTest.php
+++ b/tests/OriginTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests;
 
 use Intervention\Image\Origin;
diff --git a/tests/ResolutionTest.php b/tests/ResolutionTest.php
index 08c8967c..4f8ae2f0 100644
--- a/tests/ResolutionTest.php
+++ b/tests/ResolutionTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests;
 
 use Intervention\Image\Resolution;
diff --git a/tests/TestCase.php b/tests/TestCase.php
index da94a058..b0691110 100644
--- a/tests/TestCase.php
+++ b/tests/TestCase.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests;
 
 use Intervention\Image\Colors\Rgb\Channels\Alpha;
diff --git a/tests/Traits/CanCreateGdTestImage.php b/tests/Traits/CanCreateGdTestImage.php
index 165b9d2f..7e3425ca 100644
--- a/tests/Traits/CanCreateGdTestImage.php
+++ b/tests/Traits/CanCreateGdTestImage.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Traits;
 
 use Intervention\Image\Drivers\Gd\Core;
diff --git a/tests/Traits/CanCreateImagickTestImage.php b/tests/Traits/CanCreateImagickTestImage.php
index d9692084..a94b7271 100644
--- a/tests/Traits/CanCreateImagickTestImage.php
+++ b/tests/Traits/CanCreateImagickTestImage.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Traits;
 
 use Imagick;
diff --git a/tests/Typography/FontFactoryTest.php b/tests/Typography/FontFactoryTest.php
index 08614702..af98747c 100644
--- a/tests/Typography/FontFactoryTest.php
+++ b/tests/Typography/FontFactoryTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Typography;
 
 use Intervention\Image\Interfaces\FontInterface;
diff --git a/tests/Typography/FontTest.php b/tests/Typography/FontTest.php
index 311bc52a..e45f372d 100644
--- a/tests/Typography/FontTest.php
+++ b/tests/Typography/FontTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Typography;
 
 use Intervention\Image\Tests\TestCase;
diff --git a/tests/Typography/LineTest.php b/tests/Typography/LineTest.php
index 8616412e..1c7d3432 100644
--- a/tests/Typography/LineTest.php
+++ b/tests/Typography/LineTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Typography;
 
 use Intervention\Image\Geometry\Point;
diff --git a/tests/Typography/TextBlockTest.php b/tests/Typography/TextBlockTest.php
index 4f8cad43..3f56b8ed 100644
--- a/tests/Typography/TextBlockTest.php
+++ b/tests/Typography/TextBlockTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Intervention\Image\Tests\Typography;
 
 use Intervention\Image\Tests\TestCase;