diff --git a/src/lib/util.ts b/src/lib/util.ts
index e278247c..96cfb241 100644
--- a/src/lib/util.ts
+++ b/src/lib/util.ts
@@ -129,7 +129,7 @@ const magicNumberToMimeType = new Map<RegExp, string>([
   [/^II*/, 'image/tiff'],
   [/^MM\x00*/, 'image/tiff'],
   [/^RIFF....WEBPVP8[LX ]/, 'image/webp'],
-  [/\xF4\xFF\x6F/, 'image/webp2'], // Not sure about this one tho lol
+  [/^\xF4\xFF\x6F/, 'image/webp2'],
   [/^\x00\x00\x00 ftypavif\x00\x00\x00\x00/, 'image/avif'],
   [/^\xff\x0a/, 'image/jpegxl'],
 ]);