diff --git a/kag/solver/server/main_server.py b/kag/solver/server/main_server.py
index 755e35909..0816819af 100644
--- a/kag/solver/server/main_server.py
+++ b/kag/solver/server/main_server.py
@@ -14,7 +14,7 @@ def run_main_solver(task: TaskReq):
         is_report=task.req.report,
         host_addr=task.req.host_addr,
         app_id=task.app_id,
-        params=task.config,
+        params={"config": task.config},
     )