diff --git a/scripts/uncloud b/scripts/uncloud
index 4f83e9e..6da98e0 100755
--- a/scripts/uncloud
+++ b/scripts/uncloud
@@ -73,10 +73,14 @@ if __name__ == '__main__':
         arguments = vars(args)
         print(arguments)
         print(etcd_parser)
+
+        name = arguments.pop('command')
+        mod = importlib.import_module('uncloud.{}.main'.format(name))
+        main = getattr(mod, 'main')
+
+        if component in ETCD_COMPONENTS:
+            import etcd3
         try:
-            name = arguments.pop('command')
-            mod = importlib.import_module('uncloud.{}.main'.format(name))
-            main = getattr(mod, 'main')
             main(arguments)
         except UncloudException as err:
             logger.error(err)