diff --git a/spec/layout/demo/top.md b/spec/layout/demo/top.md
index c6d354e5103cebfb33a7012d7d395e37d897e339..90a58be2b944f5ee714b2e1807f9c2bb80f9af6d 100644
--- a/spec/layout/demo/top.md
+++ b/spec/layout/demo/top.md
@@ -46,7 +46,7 @@ ReactDOM.render(
           </Breadcrumb>
         </div>
         <div className="ant-layout-container">
-          <div style={{ height: 240 }}></div>
+          <div style={{ height: 210 }}></div>
         </div>
       </div>
       <div className="ant-layout-footer">