diff --git a/sdk/python/ragflow_sdk/modules/chat.py b/sdk/python/ragflow_sdk/modules/chat.py
index 53fcc1af9..474fa54b8 100644
--- a/sdk/python/ragflow_sdk/modules/chat.py
+++ b/sdk/python/ragflow_sdk/modules/chat.py
@@ -60,6 +60,12 @@ class Chat(Base):
             super().__init__(rag, res_dict)
 
     def update(self, update_message: dict):
+        if not isinstance(update_message, dict):
+            raise Exception("ValueError('`update_message` must be a dict')")
+        if update_message.get("llm") == {}:
+            raise Exception("ValueError('`llm` cannot be empty')")
+        if update_message.get("prompt") == {}:
+            raise Exception("ValueError('`prompt` cannot be empty')")
         res = self.put(f"/chats/{self.id}", update_message)
         res = res.json()
         if res.get("code") != 0: