diff --git a/demo01/index.html b/demo01/index.html
index acdc3f1f..89801fe2 100644
--- a/demo01/index.html
+++ b/demo01/index.html
@@ -10,7 +10,7 @@
     <div id="example"></div>
     <script type="text/babel">
       ReactDOM.render(
-        <h1>Hello, world!</h1>,
+        <h1>Hello, world!just checking how its working</h1>,
         document.getElementById('example')
       );
     </script>