diff --git a/README.rst b/README.rst
index 8093fcc..a96918d 100644
--- a/README.rst
+++ b/README.rst
@@ -67,8 +67,7 @@ Define events in a namespace. ::
             print 'on_aaa_response', args
             self.emit('bbb')
 
-    socketIO = SocketIO('localhost', 8000)
-    socketIO.define(Namespace)
+    socketIO = SocketIO('localhost', 8000, Namespace)
     socketIO.emit('aaa')
     socketIO.wait(seconds=1)
 
@@ -81,8 +80,7 @@ Define standard events. ::
         def on_connect(self):
             print '[Connected]'
 
-    socketIO = SocketIO('localhost', 8000)
-    socketIO.define(Namespace)
+    socketIO = SocketIO('localhost', 8000, Namespace)
     socketIO.wait(seconds=1)
 
 Define different namespaces on a single socket. ::
diff --git a/setup.py b/setup.py
index c5f8a26..b8d6c4f 100644
--- a/setup.py
+++ b/setup.py
@@ -9,7 +9,7 @@ CHANGES = open(os.path.join(here, 'CHANGES.rst')).read()
 
 setup(
     name='socketIO-client',
-    version='0.4',
+    version='0.5',
     description='A socket.io client library',
     long_description=README + '\n\n' + CHANGES,
     license='MIT',
diff --git a/socketIO_client/__init__.py b/socketIO_client/__init__.py
index 8a3b27c..59b107f 100644
--- a/socketIO_client/__init__.py
+++ b/socketIO_client/__init__.py
@@ -87,7 +87,7 @@ class BaseNamespace(object):  # pragma: no cover
 
 class SocketIO(object):
 
-    def __init__(self, host, port, secure=False, headers=None, proxies=None):
+    def __init__(self, host, port, Namespace=BaseNamespace, secure=False, headers=None, proxies=None):
         """
         Create a socket.io client that connects to a socket.io server
         at the specified host and port.  Set secure=True to use HTTPS / WSS.
@@ -97,7 +97,7 @@ class SocketIO(object):
         """
         self._socketIO = _SocketIO(host, port, secure, headers, proxies)
         self._namespaceByPath = {}
-        self.define(BaseNamespace)  # Define default namespace
+        self.define(Namespace)
 
         self._rhythmicThread = _RhythmicThread(
             self._socketIO.heartbeatInterval,