diff --git a/src/MDEditor.js b/src/MDEditor.js
index e769288..bbda11a 100644
--- a/src/MDEditor.js
+++ b/src/MDEditor.js
@@ -2,6 +2,7 @@ var classNames = require('classnames');
 var CM = require('codemirror');
 var React = require('react');
 var ReactDOM = require('react-dom');
+var PropTypes = require('prop-types');
 var Icons = require('./icons');
 
 require('codemirror/mode/xml/xml');
@@ -13,10 +14,10 @@ import { getCursorState, applyFormat } from './format.js';
 var MarkdownEditor = React.createClass({
 
 	propTypes: {
-		onChange: React.PropTypes.func,
-		options: React.PropTypes.object,
-		path: React.PropTypes.string,
-		value: React.PropTypes.string,
+		onChange: PropTypes.func,
+		options: PropTypes.object,
+		path: PropTypes.string,
+		value: PropTypes.string,
 	},
 
 	getInitialState () {