diff --git a/adventskalender/2025/index.html b/adventskalender/2025/index.html
index 0da6758..52e3076 100644
--- a/adventskalender/2025/index.html
+++ b/adventskalender/2025/index.html
@@ -22,7 +22,7 @@
     <div class="kalenderbild">
   <picture>
   <source 
-    type="image/avif" 
+    type="image/avif"
     srcset="
       assets/images/420/avif/Basisbild.avif 420w,
       assets/images/768/avif/Basisbild.avif 768w,
@@ -36,7 +36,7 @@
     sizes="100vw"
   >
   <source 
-    type="image/webp" 
+    type="image/webp"
     srcset="
       assets/images/420/webp/Basisbild.webp 420w,
       assets/images/768/webp/Basisbild.webp 768w,
@@ -50,8 +50,21 @@
     sizes="100vw"
   >
   <img 
-    src="assets/images/1920/jpeg/Basisbild.jpg" 
-    alt="Bratonien Adventskalender 2025" 
+    src="assets/images/1920/jpeg/Basisbild.jpg"
+    srcset="
+      assets/images/420/jpeg/Basisbild.jpg 420w,
+      assets/images/768/jpeg/Basisbild.jpg 768w,
+      assets/images/1024/jpeg/Basisbild.jpg 1024w,
+      assets/images/1280/jpeg/Basisbild.jpg 1280w,
+      assets/images/1600/jpeg/Basisbild.jpg 1600w,
+      assets/images/1920/jpeg/Basisbild.jpg 1920w,
+      assets/images/2560/jpeg/Basisbild.jpg 2560w,
+      assets/images/3840/jpeg/Basisbild.jpg 3840w
+    "
+    sizes="100vw"
+    alt="Bratonien Adventskalender 2025"
+    decoding="async"
+    fetchpriority="high"
   >
 </picture>
     <div class="door hinge-right" data-day="18" data-left="6" data-top="9" data-width="8.5">18</div>