diff --git a/README.md b/README.md
index 4678667..e5baf58 100644
--- a/README.md
+++ b/README.md
@@ -21,7 +21,11 @@ Then open [`localhost:8000`](http://localhost:8000) in a browser.
 
 ## Installation
 
-The easiest way to use codemirror is to install it from NPM and include it in your own React build process (using [Browserify](http://browserify.org), [Webpack](http://webpack.github.io/), etc).
+```
+npm install react-md-editor --save
+```
+
+And you may need to install codemirror. The easiest way to use codemirror is to install it from NPM and include it in your own React build process (using [Browserify](http://browserify.org), [Webpack](http://webpack.github.io/), etc).
 
 You can also use the standalone build by including `dist/codemirror.js` in your page. If you use this, make sure you have already included React, and it is available as a global variable.
 
@@ -29,13 +33,16 @@ You can also use the standalone build by including `dist/codemirror.js` in your
 npm install codemirror --save
 ```
 
-
 ## Usage
 
 ```js
 var React = require('react'),
 	Editor = require('react-md-editor');
 
+// you may need import css in your js if you use webpack or tools can build css
+// or @import in your less file like [the example.less](https://github.com/JedWatson/react-md-editor/blob/master/example/src/example.less#L77)
+// import 'react-md-editor/dist/react-md-editor.min.css';
+
 var App = React.createClass({
 	getInitialState: function() {
 		return {
diff --git a/src/MDEditor.js b/src/MDEditor.js
index e769288..9a89256 100644
--- a/src/MDEditor.js
+++ b/src/MDEditor.js
@@ -17,6 +17,7 @@ var MarkdownEditor = React.createClass({
 		options: React.PropTypes.object,
 		path: React.PropTypes.string,
 		value: React.PropTypes.string,
+		className: React.PropTypes.string,
 	},
 
 	getInitialState () {
@@ -125,9 +126,10 @@ var MarkdownEditor = React.createClass({
 	},
 
 	render () {
+		var editorWrapperClassName = classNames('MDEditor', this.props.className);
 		var editorClassName = classNames('MDEditor_editor', { 'MDEditor_editor--focused': this.state.isFocused });
 		return (
-			<div className="MDEditor">
+			<div className={editorWrapperClassName}>
 				{this.renderToolbar()}
 				<div className={editorClassName}>
 					<textarea ref="codemirror" name={this.props.path} defaultValue={this.props.value} autoComplete="off" />