diff --git a/python/paddle_serving_server/web_service.py b/python/paddle_serving_server/web_service.py
index 5fa9caa4b64d25a2a0012e18aeb59a9f2e43d951..adf0d68c08c040140f4e4e5bb1b4f6b7743599a7 100755
--- a/python/paddle_serving_server/web_service.py
+++ b/python/paddle_serving_server/web_service.py
@@ -59,7 +59,7 @@ class WebService(object):
         self.workdir = workdir
         self.port = port
         self.device = device
-        default_port = 6000
+        default_port = 12000
         self.port_list = []
         for i in range(1000):
             if self.port_is_available(default_port + i):
diff --git a/python/paddle_serving_server_gpu/web_service.py b/python/paddle_serving_server_gpu/web_service.py
index ab01dcc20b4b9018ca0589916e1865547955e3f2..ed7f16c5b822335d83937f013f44d90b01c0a19a 100644
--- a/python/paddle_serving_server_gpu/web_service.py
+++ b/python/paddle_serving_server_gpu/web_service.py
@@ -82,7 +82,7 @@ class WebService(object):
         self.device = device
         self.gpuid = gpuid
         self.port_list = []
-        default_port = 6000
+        default_port = 12000
         for i in range(1000):
             if self.port_is_available(default_port + i):
                 self.port_list.append(default_port + i)