diff --git a/adventskalender/2025/index.html b/adventskalender/2025/index.html
index ef41f6d..8df21d1 100644
--- a/adventskalender/2025/index.html
+++ b/adventskalender/2025/index.html
@@ -31,10 +31,10 @@
   <source
     type="image/avif"
     srcset="
-      assets/images/420/avif/Basisbild.avif 420w,
-      assets/images/768/avif/Basisbild.avif 768w,
+      assets/images/480/avif/Basisbild.avif 480w,
+      assets/images/720/avif/Basisbild.avif 720w,
       assets/images/1024/avif/Basisbild.avif 1024w,
-      assets/images/1280/avif/Basisbild.avif 1280w,
+      assets/images/1366/avif/Basisbild.avif 1366w,
       assets/images/1600/avif/Basisbild.avif 1600w,
       assets/images/1920/avif/Basisbild.avif 1920w,
       assets/images/2560/avif/Basisbild.avif 2560w,
@@ -44,17 +44,17 @@
       (min-width: 2560px) 2560px,
       (min-width: 1920px) 1920px,
       (min-width: 1600px) 1600px,
-      (min-width: 1280px) 1280px,
+      (min-width: 1366px) 1366px,
       100vw">
 
   <!-- WebP -->
   <source
     type="image/webp"
     srcset="
-      assets/images/420/webp/Basisbild.webp 420w,
-      assets/images/768/webp/Basisbild.webp 768w,
+      assets/images/480/webp/Basisbild.webp 480w,
+      assets/images/720/webp/Basisbild.webp 720w,
       assets/images/1024/webp/Basisbild.webp 1024w,
-      assets/images/1280/webp/Basisbild.webp 1280w,
+      assets/images/1366/webp/Basisbild.webp 1366w,
       assets/images/1600/webp/Basisbild.webp 1600w,
       assets/images/1920/webp/Basisbild.webp 1920w,
       assets/images/2560/webp/Basisbild.webp 2560w,
@@ -64,17 +64,17 @@
       (min-width: 2560px) 2560px,
       (min-width: 1920px) 1920px,
       (min-width: 1600px) 1600px,
-      (min-width: 1280px) 1280px,
+      (min-width: 1366px) 1366px,
       100vw">
 
   <!-- JPEG-Fallback -->
   <img
-    src="assets/images/1280/jpeg/Basisbild.jpg"
+    src="assets/images/1366/jpeg/Basisbild.jpg"
     srcset="
-      assets/images/420/jpeg/Basisbild.jpg 420w,
-      assets/images/768/jpeg/Basisbild.jpg 768w,
+      assets/images/480/jpeg/Basisbild.jpg 480w,
+      assets/images/720/jpeg/Basisbild.jpg 720w,
       assets/images/1024/jpeg/Basisbild.jpg 1024w,
-      assets/images/1280/jpeg/Basisbild.jpg 1280w,
+      assets/images/1366/jpeg/Basisbild.jpg 1366w,
       assets/images/1600/jpeg/Basisbild.jpg 1600w,
       assets/images/1920/jpeg/Basisbild.jpg 1920w,
       assets/images/2560/jpeg/Basisbild.jpg 2560w,
@@ -84,7 +84,7 @@
       (min-width: 2560px) 2560px,
       (min-width: 1920px) 1920px,
       (min-width: 1600px) 1600px,
-      (min-width: 1280px) 1280px,
+      (min-width: 1366px) 1366px,
       100vw"
     alt="Bratonien Adventskalender 2025"
     decoding="async"