diff --git a/eleventy.config.js b/eleventy.config.js
index 057b7bb..476e141 100644
--- a/eleventy.config.js
+++ b/eleventy.config.js
@@ -76,7 +76,8 @@ export default async function (eleventyConfig) {
     outputDir: './public/img/',
     defaultAttributes: {
       loading: 'lazy',
-      decoding: 'async'
+      decoding: 'async',
+      sizes: '(min-width: 1280px) 960px, (min-width: 1024px) 768px, (min-width: 640px) 640px, 480px'
     }
   });
   eleventyConfig.addPlugin(feedPlugin, {
diff --git a/src/posts.njk b/src/posts.njk
index 42950ad..9cebc3b 100644
--- a/src/posts.njk
+++ b/src/posts.njk
@@ -20,7 +20,7 @@ pagination:
     </div>
 
     {% if post.data.image and post.data.image.src != '' %}
-      <img src="{{ post.data.image.src }}" alt="{{ post.data.image.alt }}" sizes="(min-width: 1280px) 960px, (min-width: 1024px) 768px, (min-width: 640px) 640px, 480px">
+      <img src="{{ post.data.image.src }}" alt="{{ post.data.image.alt }}">
     {% endif %}
 
     <p>{{ post.data.description }}</p>