diff --git a/README.md b/README.md
index 7b679b0..13f1201 100644
--- a/README.md
+++ b/README.md
@@ -50,25 +50,35 @@ var server = PeerServer({
   port: 9000,
   ssl: {
     key: fs.readFileSync('/path/to/your/ssl/key/here.key'),
-    certificate: fs.readFileSync('/path/to/your/ssl/certificate/here.crt')
+    cert: fs.readFileSync('/path/to/your/ssl/certificate/here.crt')
   }
 });
 ```
 
 ### Combining with existing express app
 
-WebSocket server needs server instance to bootup, so we should create express app, then get server from `listen` method and only after that bind PeerServer to express application.
-
 ```javascript
 var express = require('express');
 var app = express();
-var PeerServer = require('peer').PeerServer;
+var ExpressPeerServer = require('peer').ExpressPeerServer;
 
 app.get('/', function (req, res, next) { res.send('Hello world!'); });
 
 var server = app.listen(9000);
 
-app.use(PeerServer({ server: server, path: '/api' }));
+var options = {
+    debug: true
+}
+
+app.use('/api', ExpressPeerServer(server, options));
+
+// OR
+
+var server = require('http').createServer(app);
+
+app.use('/api', ExpressPeerServer(server, options));
+
+server.listen(9000);
 ```
 
 ### Events
diff --git a/bin/peerjs b/bin/peerjs
index 27ea169..b65cb22 100755
--- a/bin/peerjs
+++ b/bin/peerjs
@@ -4,8 +4,8 @@ var path = require('path')
     , pkg = require('../package.json')
     , fs = require('fs')
     , version = pkg.version
-    , app = require('express')()
-    , PeerServer = require('../lib')
+    , PeerServer = require('../lib').PeerServer
+    , util = require('../lib/util')
     , opts = require('optimist')
         .usage('Usage: $0')
         .options({
@@ -54,7 +54,8 @@ var path = require('path')
         },
         path: {
             demand: false,
-            description: 'custom path'
+            description: 'custom path',
+        default: '/'
         },
         allow_discovery: {
             demand: false,
@@ -64,22 +65,33 @@ var path = require('path')
         .boolean('allow_discovery')
         .argv;
 
-opts.version = version;
-
-if (opts.sslkey && opts.sslcert) {
-    opts['ssl'] = {};
-    opts.ssl['key'] = fs.readFileSync(path.resolve(opts.sslkey));
-    opts.ssl['certificate'] = fs.readFileSync(path.resolve(opts.sslcert));
-}
-
 process.on('uncaughtException', function(e) {
     console.error('Error: ' + e);
 });
 
-opts.server = app.listen(opts.port);
+if (opts.sslkey || opts.sslcert) {
+    if (opts.sslkey && opts.sslcert) {
+        opts.ssl = {
+            key: fs.readFileSync(path.resolve(opts.sslkey)),
+            cert: fs.readFileSync(path.resolve(opts.sslcert))
+        }
 
-app.use(PeerServer(opts));
+        delete opts.sslkey;
+        delete opts.sslcert;
+    } else {
+        util.prettyError('Warning: PeerServer will not run because either ' +
+            'the key or the certificate has not been provided.');
+        process.exit(1);
+    }
+}
 
-console.log(
-    'Started PeerServer, port: ' + opts.port + ', path: ' + (opts.path || '/') + (" (v. %s)"), version
-);
+var path = opts.path;
+var server = PeerServer(opts, function(server) {
+    var host = server.address().address;
+    var port = server.address().port;
+
+    console.log(
+        'Started PeerServer on ' + host + ', port: ' + port + ', path: ' +
+        path + (" (v. %s)"), version
+    );
+});
diff --git a/lib/index.js b/lib/index.js
index 6ee38ea..8680fe2 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -3,42 +3,26 @@ var mixin = require('utils-merge');
 var proto = require('./server');
 var util = require('./util');
 var http = require('http');
+var https = require('https');
+
+function ExpressPeerServer(server, options) {
+    if (!server) {
+        throw new Error('Server is not passed to constructor - '+
+            'can\'t start PeerServer');
+    }
 
-function createPeerServer(options, callback) {
     var app = express();
 
     mixin(app, proto);
 
-    app.options = {
-        host: '0.0.0.0',
-        port: null,
-        server: null,
+    options = app.options = mixin({
         debug: false,
         timeout: 5000,
         key: 'peerjs',
         ip_limit: 5000,
         concurrent_limit: 5000,
-        ssl: {},
-        path: '/',
         allow_discovery: false
-    };
-
-    mixin(app.options, options);
-
-    // Print warning if only one of the two is given.
-    if (Object.keys(app.options.ssl).length === 1) {
-        util.prettyError('Warning: PeerServer will not run on an HTTPS server' +
-            ' because either the key or the certificate has not been provided.');
-    }
-
-    app.options.ssl.name = 'PeerServer';
-
-    if (app.options.path[0] !== '/') {
-        app.options.path = '/' + app.options.path;
-    }
-    if (app.options.path[app.options.path.length - 1] !== '/') {
-        app.options.path += '/';
-    }
+    }, options);
 
     // Connected clients
     app._clients = {};
@@ -46,24 +30,66 @@ function createPeerServer(options, callback) {
     // Messages waiting for another peer.
     app._outstanding = {};
 
-    // Initialize HTTP routes. This is only used for the first few milliseconds
-    // before a socket is opened for a Peer.
-    app._initializeHTTP();
-
     // Mark concurrent users per ip
     app._ips = {};
 
-    app._setCleanupIntervals();
-
-    app._server = options.server;
-
-    if (!app._server) {
-        throw new Error('Server is not passed to constructor - can\'t start PeerServer');
-    }
-
-    app._initializeWSS();
+    app.on('mount', function() {
+        // Initialize HTTP routes. This is only used for the first few milliseconds
+        // before a socket is opened for a Peer.
+        app._initializeHTTP();
+        app._setCleanupIntervals();
+        app._initializeWSS(server);
+    });
 
     return app;
 }
 
-exports = module.exports = createPeerServer;
+function PeerServer(options, callback) {
+    var app = express();
+
+    var path = options.path || '/';
+    var port = options.port;
+
+    delete options.path;
+    delete options.port;
+
+    if (path[0] !== '/') {
+        path = '/' + path;
+    }
+
+    if (path[path.length - 1] !== '/') {
+        path += '/';
+    }
+
+    var server;
+    if (options.ssl) {
+        if (options.ssl.certificate) {
+            // Preserve compatibility with 0.2.7 API
+            options.ssl.cert = options.ssl.certificate;
+            delete options.ssl.certificate;
+        }
+
+        server = https.createServer(options.ssl, app);
+        delete options.ssl;
+    } else {
+        server = http.createServer(app);
+    }
+
+    var peerjs = ExpressPeerServer(server, options);
+    app.use(path, peerjs);
+
+    if (callback) {
+        server.listen(port, function() {
+            callback(server);
+        });
+    } else {
+        server.listen(port);
+    }
+
+    return peerjs;
+}
+
+exports = module.exports = {
+    ExpressPeerServer: ExpressPeerServer,
+    PeerServer: PeerServer
+};
diff --git a/lib/server.js b/lib/server.js
index 470e0d8..beda7e7 100644
--- a/lib/server.js
+++ b/lib/server.js
@@ -1,5 +1,4 @@
 var util = require('./util');
-var express = require('express');
 var bodyParser = require('body-parser');
 var WebSocketServer = require('ws').Server;
 var url = require('url');
@@ -7,11 +6,18 @@ var url = require('url');
 var app = exports = module.exports = {};
 
 /** Initialize WebSocket server. */
-app._initializeWSS = function() {
+app._initializeWSS = function(server) {
     var self = this;
 
+    if (this.mountpath instanceof Array) {
+        throw new Error("This app can only be mounted on a single path");
+    }
+
+    var path = this.mountpath;
+    var path = path + (path[path.length - 1] != '/' ? '/' : '') + 'peerjs';
+
     // Create WebSocket server as well.
-    this._wss = new WebSocketServer({ path: this.options.path + 'peerjs', server: this._server});
+    this._wss = new WebSocketServer({ path: path, server: server});
 
     this._wss.on('connection', function(socket) {
         var query = url.parse(socket.upgradeReq.url, true).query;
@@ -139,13 +145,13 @@ app._initializeHTTP = function() {
     this.use(util.allowCrossDomain);
 
     // Retrieve guaranteed random ID.
-    this.get(this.options.path + ':key/id', function(req, res, next) {
+    this.get('/:key/id', function(req, res, next) {
         res.contentType = 'text/html';
         res.send(self._generateClientId(req.params.key));
     });
 
     // Server sets up HTTP streaming when you get post an ID.
-    this.post(this.options.path + ':key/:id/:token/id', function(req, res, next) {
+    this.post('/:key/:id/:token/id', function(req, res, next) {
         var id = req.params.id;
         var token = req.params.token;
         var key = req.params.key;
@@ -167,7 +173,7 @@ app._initializeHTTP = function() {
     });
 
     // Get a list of all peers for a key, enabled by the `allowDiscovery` flag.
-    this.get(this.options.path + ':key/peers', function(req, res, next) {
+    this.get('/:key/peers', function(req, res, next) {
         var key = req.params.key;
         if (self._clients[key]) {
             self._checkAllowsDiscovery(key, function(isAllowed) {
@@ -213,13 +219,13 @@ app._initializeHTTP = function() {
         }
     };
 
-    this.post(this.options.path + ':key/:id/:token/offer', handle);
+    this.post('/:key/:id/:token/offer', handle);
 
-    this.post(this.options.path + ':key/:id/:token/candidate', handle);
+    this.post('/:key/:id/:token/candidate', handle);
 
-    this.post(this.options.path + ':key/:id/:token/answer', handle);
+    this.post('/:key/:id/:token/answer', handle);
 
-    this.post(this.options.path + ':key/:id/:token/leave', handle);
+    this.post('/:key/:id/:token/leave', handle);
 };
 
 /** Saves a streaming response and takes care of timeouts and headers. */
diff --git a/lib/util.js b/lib/util.js
index a4bd656..2c89ca8 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -25,9 +25,7 @@ var util = {
     return (Math.random().toString(36) + '0000000000000000000').substr(2, 16);
   },
   prettyError: function (msg) {
-    if (util.debug) {
       console.log('ERROR PeerServer: ', msg);
-    }
   },
   log: function() {
     if (util.debug) {