diff --git a/python/paddle_serving_server/__init__.py b/python/paddle_serving_server/__init__.py
index f4f3248c8174487b51554f27182c0c0cd9740d25..7db647f97560c1ae78ec4a11ad6f22e3afebebc5 100644
--- a/python/paddle_serving_server/__init__.py
+++ b/python/paddle_serving_server/__init__.py
@@ -274,7 +274,8 @@ class Server(object):
                 self.model_config_paths[node.name] = path
             print("You have specified multiple model paths, please ensure "
                   "that the input and output of multiple models are the same.")
-            workflow_oi_config_path = self.model_config_paths.items()[0][1]
+            workflow_oi_config_path = list(self.model_config_paths.items())[0][
+                1]
         else:
             raise Exception("The type of model_config_paths must be str or "
                             "dict({op: model_path}), not {}.".format(
diff --git a/python/paddle_serving_server_gpu/__init__.py b/python/paddle_serving_server_gpu/__init__.py
index 5a06bd712a836617047b0cc947956fc5d2213daa..7acc926c7f7fc465da20a7609bc767a5289d2e61 100644
--- a/python/paddle_serving_server_gpu/__init__.py
+++ b/python/paddle_serving_server_gpu/__init__.py
@@ -320,7 +320,8 @@ class Server(object):
                 self.model_config_paths[node.name] = path
             print("You have specified multiple model paths, please ensure "
                   "that the input and output of multiple models are the same.")
-            workflow_oi_config_path = self.model_config_paths.items()[0][1]
+            workflow_oi_config_path = list(self.model_config_paths.items())[0][
+                1]
         else:
             raise Exception("The type of model_config_paths must be str or "
                             "dict({op: model_path}), not {}.".format(