diff --git a/main.js b/main.js
index c664207..594bc03 100644
--- a/main.js
+++ b/main.js
@@ -18,8 +18,8 @@ async function processAlbumCover(url) {
         const imageSharp = sharp(imageBuffer);
         const metadata = await imageSharp.metadata();
 
-        if (metadata.format !== 'jpeg' && metadata.format !== 'jpg') {
-            throw new Error('Not a JPEG image');
+        if (metadata.format !== 'jpeg' && metadata.format !== 'jpg' && metadata.format !== 'png') {
+            throw new Error('Not a supported image format');
         }
 
         const dominantColor = await getDominantColor(imageBuffer);