diff --git a/src/Drivers/Gd/Frame.php b/src/Drivers/Gd/Frame.php
index 5db5f767..e344f53f 100644
--- a/src/Drivers/Gd/Frame.php
+++ b/src/Drivers/Gd/Frame.php
@@ -47,7 +47,7 @@ class Frame extends AbstractFrame implements FrameInterface
      *
      * @see FrameInterface::setNative()
      */
-    public function setNative($native): FrameInterface
+    public function setNative(mixed $native): FrameInterface
     {
         $this->native = $native;
 
diff --git a/src/Drivers/Imagick/Core.php b/src/Drivers/Imagick/Core.php
index b0e13a40..87dcf986 100644
--- a/src/Drivers/Imagick/Core.php
+++ b/src/Drivers/Imagick/Core.php
@@ -50,7 +50,7 @@ class Core implements CoreInterface, Iterator
      *
      * @see CollectionInterface::push()
      */
-    public function push($item): CollectionInterface
+    public function push(mixed $item): CollectionInterface
     {
         return $this->add($item);
     }
@@ -60,7 +60,7 @@ class Core implements CoreInterface, Iterator
      *
      * @see CollectionInterface::get()
      */
-    public function get(int|string $key, $default = null): mixed
+    public function get(int|string $key, mixed $default = null): mixed
     {
         try {
             $this->imagick->setIteratorIndex($key);
@@ -76,7 +76,7 @@ class Core implements CoreInterface, Iterator
      *
      * @see CollectionInterface::getAtPosition()
      */
-    public function getAtPosition(int $key = 0, $default = null): mixed
+    public function getAtPosition(int $key = 0, mixed $default = null): mixed
     {
         return $this->get($key, $default);
     }
diff --git a/src/Drivers/Imagick/Frame.php b/src/Drivers/Imagick/Frame.php
index 0f9fd639..269a8dba 100644
--- a/src/Drivers/Imagick/Frame.php
+++ b/src/Drivers/Imagick/Frame.php
@@ -46,7 +46,7 @@ class Frame extends AbstractFrame implements FrameInterface
      *
      * @see DriverInterface::setNative()
      */
-    public function setNative($native): FrameInterface
+    public function setNative(mixed $native): FrameInterface
     {
         $this->native = $native;
 
diff --git a/src/InputHandler.php b/src/InputHandler.php
index 85eef363..9189aad9 100644
--- a/src/InputHandler.php
+++ b/src/InputHandler.php
@@ -89,7 +89,7 @@ class InputHandler implements InputHandlerInterface
      *
      * @see InputHandlerInterface::handle()
      */
-    public function handle($input): ImageInterface|ColorInterface
+    public function handle(mixed $input): ImageInterface|ColorInterface
     {
         foreach ($this->decoders as $decoder) {
             try {