webpack-dev-server: Can not access webpacl-dev-server through LAN?

I using webpack-dev-server for developing, and I wanted to test some page in my mobile phone which connect to the same wifi with my laptop. but I can not access in my mobile phone.

webpack.config.js

var path = require('path');
var webpack = require('webpack');
var I18nPlugin = require('i18n-webpack-plugin');
var ExtractTextPlugin = require('extract-text-webpack-plugin');
var languages = {
    'en_US': null,
    'zh_CN': require('./js/i18n/zh_CN.json'),
    'vi_VN': require('./js/i18n/vi_VN.json')
};

module.exports = Object.keys(languages).map(function(language) {
    return {
        name: language,
        entry: [
            'webpack-dev-server/client?http://localhost:3333',
            'webpack/hot/dev-server',
            './js/app.js'
        ],
        output: {
            path: path.join(__dirname, 'build'),
            filename: language + '.bundle.js',
            publicPath: '/build/'
        },
        module: {
            loaders: [{
                test: /\.css$/,
                loader: ExtractTextPlugin.extract('style-loader', 'css-loader', {
                    publicPath: './'
                })
            }, {
                test: /\.less$/,
                loader: 'style-loader!css-loader!less-loader'
            }, {
                test: /\.(ttf|eot|svg|woff(2)?)(\?v=[\d.]+)?(\?[a-z0-9#-]+)?$/,
                loader: 'file-loader'
            }, {
                test: /\.(png|jpg|gif)$/,
                loader: 'url-loader?limit=8192'
            }, {
                test: /\.jsx?$/,
                exclude: /(node_modules|bower_components)/,
                loader: 'babel',
                query: {
                    presets: ['react', 'es2015']
                }
            }]
        },
        plugins: [
            // new webpack.optimize.UglifyJsPlugin(),
            new I18nPlugin(
                languages[language]
            ),
            new ExtractTextPlugin('bundle.css'),
            new webpack.HotModuleReplacementPlugin(),
            new webpack.NoErrorsPlugin()
        ]
    };
});

server.js (config for webpack dev server)

var webpack = require('webpack');
var WebpackDevServer = require('webpack-dev-server');
var config = require('./webpack.config.js');

var PORT = 3333;

new WebpackDevServer(webpack(config), {
    publicPath: '/build/',
    hot: true,
    historyApiFallback: true,
    stats: { colors: true }
}).listen(PORT, 'localhost', function(err) {
    if (err) {
        console.log(err);
    }

    console.log(':::Server Running::: ==> localhost:' + PORT);
});

open localhost in my laptop

but I can not open http://[my-laptop-ip]:3333 in my mobile phone