diff --git a/README.md b/README.md
index 34db79e..a3d30e6 100644
--- a/README.md
+++ b/README.md
@@ -33,6 +33,7 @@ open http://localhost:8000
 
 <!-- prettier-ignore -->
 ```js | pure
+import { useRef } from 'react';
 import Tour from '@rc-component/tour';
 
 const Demo = () => {