diff --git a/collection/opendb-open-data/collection.json b/collection/opendb-open-data/collection.json
index b045856..07276f1 100644
--- a/collection/opendb-open-data/collection.json
+++ b/collection/opendb-open-data/collection.json
@@ -12,7 +12,7 @@
         "description": "字段_id对应的值"
       },
       "expired": {
-        "bsonType": "date",
+        "bsonType": "timestamp",
         "description": "过期时间"
       }
     }