diff --git a/osschat_insert.py b/osschat_insert.py
index cb38028..92f7ccc 100644
--- a/osschat_insert.py
+++ b/osschat_insert.py
@@ -13,13 +13,13 @@
 # limitations under the License.
 
 from typing import Dict, Optional, Any
-from pydantic import BaseModel
+from pydantic import BaseModel, Extra
 
 from towhee import ops, pipe, AutoPipes, AutoConfig
 
 
 @AutoConfig.register
-class OSSChatInsertConfig(BaseModel):
+class OSSChatInsertConfig(BaseModel, extra=Extra.allow):
     """
     Config of pipeline
     """