diff --git a/lib/static/css/main.css b/lib/static/css/main.css
index 526268601c..2a159f4e3c 100644
--- a/lib/static/css/main.css
+++ b/lib/static/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;