diff --git a/js/src/util/sanitizer.js b/js/src/util/sanitizer.js
index 58caeb4864..f86cbe88a6 100644
--- a/js/src/util/sanitizer.js
+++ b/js/src/util/sanitizer.js
@@ -76,7 +76,7 @@ export const DefaultWhitelist = {
   h5: [],
   h6: [],
   i: [],
-  img: ['src', 'alt', 'title', 'width', 'height'],
+  img: ['src', 'srcset', 'alt', 'title', 'width', 'height'],
   li: [],
   ol: [],
   p: [],