diff --git a/demos/scroll/main.html b/demos/scroll/main.html
index b2ca6cf366..698669bdab 100644
--- a/demos/scroll/main.html
+++ b/demos/scroll/main.html
@@ -11,8 +11,8 @@
 
 <style>
   .map-div {
-    width: 1500px;
-    height: 1500px;
+    width: 2600px;
+    height: 1400px;
     background: url('./map.jpeg') no-repeat;
   }
 </style>