diff --git a/tutorial/py/PythonServer.py b/tutorial/py/PythonServer.py
index eb132a1..7c590ba 100755
--- a/tutorial/py/PythonServer.py
+++ b/tutorial/py/PythonServer.py
@@ -85,7 +85,7 @@
 if __name__ == '__main__':
     handler = CalculatorHandler()
     processor = Calculator.Processor(handler)
-    transport = TSocket.TServerSocket(port=9090)
+    transport = TSocket.TServerSocket(host='127.0.0.1', port=9090)
     tfactory = TTransport.TBufferedTransportFactory()
     pfactory = TBinaryProtocol.TBinaryProtocolFactory()