diff --git a/backend/apps/system/crud/assistant.py b/backend/apps/system/crud/assistant.py
index da9ec232..a175320d 100644
--- a/backend/apps/system/crud/assistant.py
+++ b/backend/apps/system/crud/assistant.py
@@ -281,5 +281,5 @@ def get_out_ds_conf(ds: AssistantOutDsSchema, timeout:int=30) -> str:
         "dbSchema":ds.db_schema or '',
         "timeout":timeout
     }
-    conf.extraJdbc = ''
+    conf["extraJdbc"] = ''
     return aes_encrypt(json.dumps(conf))