diff --git a/iOS/Resources/styleSheet.css b/iOS/Resources/styleSheet.css
index aa3042fcb..2a8be9316 100644
--- a/iOS/Resources/styleSheet.css
+++ b/iOS/Resources/styleSheet.css
@@ -120,7 +120,7 @@ code, pre {
 pre  {
 	white-space: pre-wrap;
 }
-img, figure, video {
+img, figure, video, iframe {
 	max-width: 100%;
 	height: auto;
 	margin: 0 auto;