diff --git a/src/wp-content/themes/twentyfourteen/style.css b/src/wp-content/themes/twentyfourteen/style.css
index f82eccc753..f3853ef741 100644
--- a/src/wp-content/themes/twentyfourteen/style.css
+++ b/src/wp-content/themes/twentyfourteen/style.css
@@ -89,6 +89,7 @@ audio,
 canvas,
 video {
 	display: inline-block;
+	max-width: 100%;
 }
 
 html {