diff --git a/core/serializers/simple.py b/core/serializers/simple.py
index 91f6e2c8..55aa4530 100644
--- a/core/serializers/simple.py
+++ b/core/serializers/simple.py
@@ -305,4 +305,6 @@ class OrderSimpleSerializer(ModelSerializer):
             "promo_code",
             "order_products",
             "buy_time",
+            "created",
+            "modified",
         ]