diff --git a/pages/blog/posts/ietf-cooperation.md b/pages/blog/posts/ietf-cooperation.md
index 2471b1f97..47d83dc61 100644
--- a/pages/blog/posts/ietf-cooperation.md
+++ b/pages/blog/posts/ietf-cooperation.md
@@ -8,7 +8,7 @@ type: Update
 cover: /img/posts/2026/ietf-cooperation/cover.webp
 authors:
   - name: Greg Dennis
-    photo: /img/avatars/gregsdennis.jpg
+    photo: /img/avatars/gregsdennis.webp
     byline: JSON Schema Specification Editor, JSON Tooling Implementer
 ---