diff --git a/collection/opendb-app-client-key/collection.json b/collection/opendb-app-client-key/collection.json
index 9cd7c0b..e68e553 100644
--- a/collection/opendb-app-client-key/collection.json
+++ b/collection/opendb-app-client-key/collection.json
@@ -22,6 +22,10 @@
       "public_key": {
         "bsonType": "string",
         "description": "公钥，下发给客户端使用"
+      },
+      "create_date": {
+        "bsonType": "timestamp",
+        "description": "创建时间"
       }
     }
   },