diff --git a/adventskalender/2025/js/background.js b/adventskalender/2025/js/background.js
index 7e39956..15c9778 100644
--- a/adventskalender/2025/js/background.js
+++ b/adventskalender/2025/js/background.js
@@ -26,10 +26,10 @@
   }
 
   // === Bildpfad bestimmen ===
-  let imgPath = "assets/picture/Basisbild.png";
+  let imgPath = "assets/image/Basisbild.webp";
   if (dayToShow >= 1 && dayToShow <= 24) {
     const padded = String(dayToShow).padStart(2, "0");
-    imgPath = `assets/picture/${padded}.png`;
+    imgPath = `assets/image/${padded}.ebp`;
   }
 
   // === Funktion zum Setzen des Favicons ===