diff --git a/xmodule/assets/html/_display.scss b/xmodule/assets/html/_display.scss
index 25e2ce4fbd64..6206d7ec4b01 100644
--- a/xmodule/assets/html/_display.scss
+++ b/xmodule/assets/html/_display.scss
@@ -118,6 +118,7 @@ a {
 
 img {
   max-width: 100%;
+  height: auto;
 }
 
 pre {