diff --git a/payapi-spec/definitions.yaml b/payapi-spec/definitions.yaml
index 89e374d..d45a0d7 100644
--- a/payapi-spec/definitions.yaml
+++ b/payapi-spec/definitions.yaml
@@ -16,6 +16,9 @@
       required:
         - message
       properties:
+        timestamp:
+          type: string
+          format: date-time
         code:
           type: string
           title: 错误码