diff --git a/src/pyikuai/core.py b/src/pyikuai/core.py
index f74441a..73716af 100644
--- a/src/pyikuai/core.py
+++ b/src/pyikuai/core.py
@@ -9,9 +9,9 @@
 from .constants import (JSON_RESPONSE_DATA, JSON_RESPONSE_ERRMSG,
                         JSON_RESPONSE_ERRMSG_SUCCESS, JSON_RESPONSE_RESULT,
                         acl_l7_param, acl_l7_param_action, acl_mac_param,
-                        domain_blacklist_param, json_result_code, mac_qos_param,
-                        mac_comment_param, mac_group_param, rp_action,
-                        rp_func_name, rp_key, rp_order_param)
+                        domain_blacklist_param, json_result_code,
+                        mac_comment_param, mac_group_param, mac_qos_param,
+                        rp_action, rp_func_name, rp_key, rp_order_param)
 from .exceptions import (AuthenticationError, RequestError, RouterAPIError,
                          ValidationError)