diff --git a/doc/Shop.py b/doc/Shop.py
index 35a6c7ba..e3969a68 100644
--- a/doc/Shop.py
+++ b/doc/Shop.py
@@ -215,7 +215,7 @@ class Shop(object):
                 ],
                 'response': [
                     _common.RspHead(),
-                    ['block_chain', [_common.ShopTrans], '链上购买订单信息']
+                    ['block_chain', [_common.ShopTrans()], '链上购买订单信息']
                 ]
             }
         ]