diff --git a/web/packages/demo/www/index.html b/web/packages/demo/www/index.html
index 90080812e..d221cdcf7 100644
--- a/web/packages/demo/www/index.html
+++ b/web/packages/demo/www/index.html
@@ -25,7 +25,7 @@
             }
 
             #main {
-                margin: 15px;
+                margin-top: 15px;
                 width: 100%;
                 height: 100%;
                 align-self: center;