diff --git a/prerender/seo/category.cjs b/prerender/seo/category.cjs
index 68d274f..a45390e 100644
--- a/prerender/seo/category.cjs
+++ b/prerender/seo/category.cjs
@@ -55,7 +55,7 @@ const generateCategoryJsonLd = (category, products = [], baseUrl, config) => {
             product.pictureList && product.pictureList.trim()
               ? `${baseUrl}/assets/images/prod${product.pictureList
                   .split(",")[0]
-                  .trim()}.jpg`
+                  .trim()}.avif`
               : `${baseUrl}/assets/images/nopicture.jpg`,
           description: product.description 
             ? product.description.replace(/<[^>]*>/g, "").substring(0, 200)
diff --git a/prerender/seo/feeds.cjs b/prerender/seo/feeds.cjs
index acd0f1e..e608543 100644
--- a/prerender/seo/feeds.cjs
+++ b/prerender/seo/feeds.cjs
@@ -535,7 +535,7 @@ const generateProductsXml = (allProductsData = [], baseUrl, config) => {
 
       // Generate image URL
       const imageUrl = product.pictureList && product.pictureList.trim()
-        ? `${baseUrl}/assets/images/prod${product.pictureList.split(",")[0].trim()}.jpg`
+        ? `${baseUrl}/assets/images/prod${product.pictureList.split(",")[0].trim()}.avif`
         : `${baseUrl}/assets/images/nopicture.jpg`;
 
       // Generate brand (manufacturer)
diff --git a/prerender/seo/product.cjs b/prerender/seo/product.cjs
index d6b3a7c..01dad48 100644
--- a/prerender/seo/product.cjs
+++ b/prerender/seo/product.cjs
@@ -5,7 +5,7 @@ const generateProductMetaTags = (product, baseUrl, config) => {
     product.pictureList && product.pictureList.trim()
       ? `${baseUrl}/assets/images/prod${product.pictureList
           .split(",")[0]
-          .trim()}.jpg`
+          .trim()}.avif`
       : `${baseUrl}/assets/images/nopicture.jpg`;
 
 
@@ -68,7 +68,7 @@ const generateProductJsonLd = (product, baseUrl, config, categoryInfo = null) =>
     product.pictureList && product.pictureList.trim()
       ? `${baseUrl}/assets/images/prod${product.pictureList
           .split(",")[0]
-          .trim()}.jpg`
+          .trim()}.avif`
       : `${baseUrl}/assets/images/nopicture.jpg`;
 
   // Clean description for JSON-LD (remove HTML tags)
diff --git a/src/PrerenderCategory.js b/src/PrerenderCategory.js
index 0e3fdb5..1cd7206 100644
--- a/src/PrerenderCategory.js
+++ b/src/PrerenderCategory.js
@@ -111,7 +111,7 @@ const PrerenderCategory = ({ categoryId, categoryName, categorySeoName: _categor
                             component="img"
                             height="200"
                             image={product.pictureList && product.pictureList.trim() 
-                              ? `/assets/images/prod${product.pictureList.split(',')[0].trim()}.jpg` 
+                              ? `/assets/images/prod${product.pictureList.split(',')[0].trim()}.avif` 
                               : '/assets/images/nopicture.jpg'
                             }
                             alt={product.name}