diff --git a/app/assets/stylesheets/desktop/onebox.scss b/app/assets/stylesheets/desktop/onebox.scss
index fc12db0dd8d..f3a266dbc93 100644
--- a/app/assets/stylesheets/desktop/onebox.scss
+++ b/app/assets/stylesheets/desktop/onebox.scss
@@ -139,4 +139,8 @@ aside.onebox {
   }
 }
 
+.github-avatar {
+  height: 90px;
+  width: 90px;
+}