diff --git a/css/main.css b/css/main.css
index 031fa3e255..f0c75b3796 100644
--- a/css/main.css
+++ b/css/main.css
@@ -63,7 +63,7 @@ img {
   height: auto;
 }
 
-article p img {
+article p img, article iframe {
   max-width: 100%;
   display: block;
   margin-left: auto;