diff --git a/eleventy.config.js b/eleventy.config.js
index 476e141..c8895bd 100644
--- a/eleventy.config.js
+++ b/eleventy.config.js
@@ -124,7 +124,7 @@ export default async function (eleventyConfig) {
 
     const getSets = ({ url, sourceType }, i) => `url(${url}) type('${sourceType}') ${i + 1}x`;
 
-    return Object.values(imgset).flat().map(getSets);
+    return Object.values(imgset).map(format => format.map(getSets)).flat();
   });
 
   eleventyConfig.addFilter('toDateObj', (dateString) => new Date(dateString));