diff --git a/app/server/ChatbotAgent/agent_server.py b/app/server/ChatbotAgent/agent_server.py
index 2579905..bc5787c 100644
--- a/app/server/ChatbotAgent/agent_server.py
+++ b/app/server/ChatbotAgent/agent_server.py
@@ -21,7 +21,7 @@ class AgentRequestModel(BaseModel):
     stylist_path: str
     callback_url: str
     gender: str
-    max_len: int
+    max_len: int = 9
 
 
 class LCAgent(ls.LitAPI):
@@ -103,7 +103,7 @@ class LCAgent(ls.LitAPI):
         return summary
 
     async def recommend_outfit(self, request_summary: str, stylist_name: str, start_outfit=None, num_outfits: int = 1,
-                               user_id: str = "test", gender: str = "male", callback_url: str = None, max_len: str = 9):
+                               user_id: str = "test", gender: str = "male", callback_url: str = None, max_len: int = 9):
         """
         基于用户的对话历史和需求，推荐一套搭配。