diff --git a/app/assets/stylesheets/common/base/onebox.scss b/app/assets/stylesheets/common/base/onebox.scss
index dd5d5dbed4b..440a905a860 100644
--- a/app/assets/stylesheets/common/base/onebox.scss
+++ b/app/assets/stylesheets/common/base/onebox.scss
@@ -218,6 +218,7 @@ aside.onebox {
           max-width: initial;
           max-height: initial;
           float: none;
+          overflow: hidden;
         }
       }