diff --git a/BtnLink.js b/BtnLink.js
index efa116f..e7f3fd7 100644
--- a/BtnLink.js
+++ b/BtnLink.js
@@ -1,4 +1,3 @@
-import React from 'react';
 import {Link} from '@mxjs/router';
 import {Button} from '@mxjs/bootstrap';
 import PropTypes from 'prop-types';
diff --git a/DeleteLink.js b/DeleteLink.js
index 6383305..765df13 100644
--- a/DeleteLink.js
+++ b/DeleteLink.js
@@ -1,8 +1,8 @@
-import React from 'react';
+import { Component } from 'react';
 import $ from 'miaoxing';
 import PropTypes from 'prop-types';
 
-class DeleteLink extends React.Component {
+class DeleteLink extends Component {
   static propTypes = {
     message: PropTypes.string,
     href: PropTypes.string,
diff --git a/EditLink.js b/EditLink.js
index 6f3a7be..5a108bd 100644
--- a/EditLink.js
+++ b/EditLink.js
@@ -1,4 +1,3 @@
-import React from 'react';
 import {Link} from '@mxjs/router';
 import PropTypes from 'prop-types';
 
diff --git a/ListBtn.js b/ListBtn.js
index 767891f..91823c0 100644
--- a/ListBtn.js
+++ b/ListBtn.js
@@ -1,4 +1,3 @@
-import React from 'react';
 import BtnLink from './BtnLink';
 import PropTypes from 'prop-types';
 
diff --git a/NewBtn.js b/NewBtn.js
index b30a70b..dc9bf98 100644
--- a/NewBtn.js
+++ b/NewBtn.js
@@ -1,4 +1,3 @@
-import React from 'react';
 import BtnLink from './BtnLink';
 import PropTypes from 'prop-types';
 
@@ -11,4 +10,4 @@ NewBtn.propTypes = {
   children: PropTypes.node,
 };
 
-export default NewBtn;
\ No newline at end of file
+export default NewBtn;
diff --git a/__tests__/BtnLink.js b/__tests__/BtnLink.js
index 44433b2..5e6228d 100644
--- a/__tests__/BtnLink.js
+++ b/__tests__/BtnLink.js
@@ -1,4 +1,3 @@
-import React from 'react';
 import {BtnLink} from '../';
 import {MemoryRouter} from 'react-router';
 import {render} from '@testing-library/react';
diff --git a/package.json b/package.json
index c922655..49aea1d 100644
--- a/package.json
+++ b/package.json
@@ -65,6 +65,7 @@
     "@mxjs/router": "miaoxing/mxjs-router",
     "@mxjs/router-modal": "miaoxing/mxjs-router-modal",
     "babel-preset-miaoxing": "miaoxing/babel-preset-miaoxing",
-    "jest-preset-miaoxing": "miaoxing/jest-preset-miaoxing"
+    "jest-preset-miaoxing": "miaoxing/jest-preset-miaoxing",
+    "@miaoxing/dev": "miaoxing/dev"
   }
 }