diff --git a/src/Drivers/Gd/Modifiers/BrightnessModifier.php b/src/Drivers/Gd/Modifiers/BrightnessModifier.php
index ee306bf0..443a41b6 100644
--- a/src/Drivers/Gd/Modifiers/BrightnessModifier.php
+++ b/src/Drivers/Gd/Modifiers/BrightnessModifier.php
@@ -15,7 +15,7 @@ class BrightnessModifier implements ModifierInterface
     public function apply(ImageInterface $image): ImageInterface
     {
         foreach ($image as $frame) {
-            imagefilter($frame->getCore(), IMG_FILTER_BRIGHTNESS, ($this->level * 2.55));
+            imagefilter($frame->getCore(), IMG_FILTER_BRIGHTNESS, intval($this->level * 2.55));
         }
 
         return $image;