ReactDom is undefined
<p>I am using React with Webpack and Babel. I am getting a runtime error:</p>

<blockquote>
  <p>Uncaught ReferenceError: ReactDom is not defined</p>
</blockquote>

<p>My react version is:</p>

<pre><code>"devDependencies": {
   "phantomjs-polyfill": "0.0.2",
   "react-addons-test-utils": "^0.14.8"
 },    
 "dependencies": {
   "react": "^0.14.7",
   "react-dom": "^0.14.7"
 },
</code></pre>

<p>and my code is:</p>

<pre><code>import React from 'react';
import ReactDOM from 'react-dom';
import Main from './components/main';

ReactDom.render(&lt;Main /&gt;, document.getElementById('root'));
</code></pre>

<p>What am I doing wrong?</p>