diff --git a/examples/react16/src/components/HelloModal.js b/examples/react16/src/components/HelloModal.js
index 4aa2e7b..c493ae8 100644
--- a/examples/react16/src/components/HelloModal.js
+++ b/examples/react16/src/components/HelloModal.js
@@ -1,4 +1,4 @@
-import React, { useState, useEffect } from 'react';
+import React, { useState } from 'react';
 import { Button, Modal } from 'antd';
 
 export default function() {