diff --git a/app/assets/stylesheets/common/base/discourse.scss b/app/assets/stylesheets/common/base/discourse.scss
index aa7a7df17a4..72d5df007b7 100644
--- a/app/assets/stylesheets/common/base/discourse.scss
+++ b/app/assets/stylesheets/common/base/discourse.scss
@@ -15,6 +15,7 @@ big {
 blockquote {
   background-color: scale-color-diff();
   border-left: 5px solid darken(scale-color-diff(), 10%);
+  overflow: hidden;
 }
 
 a.no-href {
diff --git a/app/assets/stylesheets/embed.css.scss b/app/assets/stylesheets/embed.css.scss
index 4765ad693c2..cc73f075756 100644
--- a/app/assets/stylesheets/embed.css.scss
+++ b/app/assets/stylesheets/embed.css.scss
@@ -28,6 +28,7 @@ article.post {
     margin: 0 0 10px 0;
     background-color: scale-color-diff();
     border-left: 5px solid darken(scale-color-diff(), 10%);
+    overflow: hidden;
     p {
       margin: 0 0 10px 0;
     }