diff --git a/core/artwork/reader_resized.go b/core/artwork/reader_resized.go
index 08f42f130..cd16cbada 100644
--- a/core/artwork/reader_resized.go
+++ b/core/artwork/reader_resized.go
@@ -132,6 +132,22 @@ func (a *resizedArtworkReader) resizeImage(ctx context.Context, reader io.Reader
 	return resizeStaticImage(data, a.size, a.square)
 }
 
+// toFastScaleType converts images whose concrete type has no optimized scaler
+// in x/image/draw (e.g. *image.NYCbCrA from WebP, *image.Paletted from indexed
+// PNGs) into *image.RGBA, which has a fast path. Without this, CatmullRom.Scale
+// falls back to a generic per-pixel At()/RGBA() loop that is several times
+// slower. Fast-path types are returned unchanged.
+func toFastScaleType(img image.Image) image.Image {
+	switch img.(type) {
+	case *image.RGBA, *image.NRGBA, *image.Gray, *image.YCbCr:
+		return img
+	default:
+		rgba := image.NewRGBA(img.Bounds())
+		draw.Draw(rgba, rgba.Bounds(), img, img.Bounds().Min, draw.Src)
+		return rgba
+	}
+}
+
 func resizeStaticImage(data []byte, size int, square bool) (io.Reader, int, error) {
 	original, format, err := image.Decode(bytes.NewReader(data))
 	if err != nil {
@@ -169,6 +185,7 @@ func resizeStaticImage(data []byte, size int, square bool) (io.Reader, int, erro
 		dst = image.NewNRGBA(image.Rect(0, 0, dstW, dstH))
 		dstRect = dst.Bounds()
 	}
+	original = toFastScaleType(original)
 	xdraw.CatmullRom.Scale(dst, dstRect, original, bounds, draw.Src, nil)
 
 	buf := bufPool.Get().(*bytes.Buffer)
diff --git a/go.mod b/go.mod
index abb3e89f0..9bf7358ed 100644
--- a/go.mod
+++ b/go.mod
@@ -19,7 +19,7 @@ require (
 	github.com/dustin/go-humanize v1.0.1
 	github.com/extism/go-sdk v1.7.1
 	github.com/fatih/structs v1.1.0
-	github.com/gen2brain/webp v0.5.5
+	github.com/gen2brain/webp v0.6.0
 	github.com/go-chi/chi/v5 v5.3.0
 	github.com/go-chi/cors v1.2.2
 	github.com/go-chi/httprate v0.15.0
diff --git a/go.sum b/go.sum
index fd254bebb..682a9cfd0 100644
--- a/go.sum
+++ b/go.sum
@@ -65,8 +65,8 @@ github.com/frankban/quicktest v1.14.6/go.mod h1:4ptaffx2x8+WTWXmUCuVU6aPUX1/Mz7z
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
 github.com/fsnotify/fsnotify v1.10.1 h1:b0/UzAf9yR5rhf3RPm9gf3ehBPpf0oZKIjtpKrx59Ho=
 github.com/fsnotify/fsnotify v1.10.1/go.mod h1:TLheqan6HD6GBK6PrDWyDPBaEV8LspOxvPSjC+bVfgo=
-github.com/gen2brain/webp v0.5.5 h1:MvQR75yIPU/9nSqYT5h13k4URaJK3gf9tgz/ksRbyEg=
-github.com/gen2brain/webp v0.5.5/go.mod h1:xOSMzp4aROt2KFW++9qcK/RBTOVC2S9tJG66ip/9Oc0=
+github.com/gen2brain/webp v0.6.0 h1:VN/cmeDv78sAKbJayyB1YVm9SHlz5qXO06bo4v6V3hY=
+github.com/gen2brain/webp v0.6.0/go.mod h1:iGWMaCSw7t3I/Cv9llzEKmpnR36S8lS8VL/ZVjxU0JE=
 github.com/gkampitakis/ciinfo v0.3.2 h1:JcuOPk8ZU7nZQjdUhctuhQofk7BGHuIy0c9Ez8BNhXs=
 github.com/gkampitakis/ciinfo v0.3.2/go.mod h1:1NIwaOcFChN4fa/B0hEBdAb6npDlFL8Bwx4dfRLRqAo=
 github.com/gkampitakis/go-diff v1.3.2 h1:Qyn0J9XJSDTgnsgHRdz9Zp24RaJeKMUHg2+PDZZdC4M=