diff --git a/README.md b/README.md
index 50bbf31..50e4a1d 100644
--- a/README.md
+++ b/README.md
@@ -54,6 +54,10 @@ Deployment
 	$ python setup.py sdist bdist_wheel
 	$ twine upload dist/netkiller-devops-x.x.x.tar.gz 
 
+指定镜像
+
+	$ pip3 install netkiller-devops --upgrade -i https://pypi.org/project
+
 Backup
 ------
 [Data backup tools](https://github.com/netkiller/devops/blob/master/doc/backup.md).	
diff --git a/netkiller/docker.py b/netkiller/docker.py
index d3cb7a8..f70a3d3 100644
--- a/netkiller/docker.py
+++ b/netkiller/docker.py
@@ -436,12 +436,8 @@ def services(self, obj):
         if isinstance(obj, Services):
             if obj.dockerfile:
                 self.dockerfile[obj.name] = obj.dockerfile
-            service = obj.service.copy()
-            # service = dict(obj.service)
-            # service = copy.deepcopy(obj.service)
-            # obj.dump()
+            service = copy.deepcopy(obj.service)
             self.compose["services"].update(service)
-            # print(self.compose["services"])
         return self
 
     def networks(self, obj):
diff --git a/setup.py b/setup.py
index a9084ea..51bd0a9 100644
--- a/setup.py
+++ b/setup.py
@@ -9,7 +9,7 @@
 
 setup(
     name="netkiller-devops",
-    version="0.7.3",
+    version="0.7.4",
     author="Neo Chen",
     author_email="netkiller@msn.com",
     description="DevOps of useful deployment and automation",