diff --git a/site/theme/static/demo.less b/site/theme/static/demo.less
index b9259641b7..7efea73890 100644
--- a/site/theme/static/demo.less
+++ b/site/theme/static/demo.less
@@ -129,6 +129,7 @@
     top: 0;
     margin: 0;
     max-width: 100%;
+    width: 100%;
     vertical-align: baseline;
     box-shadow: none;
   }