diff --git a/src/Encoders/FileExtensionEncoder.php b/src/Encoders/FileExtensionEncoder.php
index d9ffa363..41b7821f 100644
--- a/src/Encoders/FileExtensionEncoder.php
+++ b/src/Encoders/FileExtensionEncoder.php
@@ -47,7 +47,7 @@ class FileExtensionEncoder extends AutoEncoder
             throw new EncoderException('No encoder found for empty file extension.');
         }
 
-        return match ($extension) {
+        return match (strtolower($extension)) {
             'webp' => new WebpEncoder($this->quality),
             'avif' => new AvifEncoder($this->quality),
             'jpeg', 'jpg' => new JpegEncoder($this->quality),
diff --git a/src/Encoders/MediaTypeEncoder.php b/src/Encoders/MediaTypeEncoder.php
index beaac6ac..b71a531b 100644
--- a/src/Encoders/MediaTypeEncoder.php
+++ b/src/Encoders/MediaTypeEncoder.php
@@ -43,7 +43,7 @@ class MediaTypeEncoder implements EncoderInterface
      */
     protected function encoderByMediaType(string $type): EncoderInterface
     {
-        return match ($type) {
+        return match (strtolower($type)) {
             'image/webp' => new WebpEncoder($this->quality),
             'image/avif' => new AvifEncoder($this->quality),
             'image/jpeg' => new JpegEncoder($this->quality),