diff --git a/src/config/official_configs.py b/src/config/official_configs.py
index e0cf931a2..d1190a07e 100644
--- a/src/config/official_configs.py
+++ b/src/config/official_configs.py
@@ -368,7 +368,7 @@ class MaimMessageConfig(ConfigBase):
     port: int = 8090
     """"端口号"""
 
-    mode: str = "ws"
+    mode: Literal["ws", "tcp"] = "ws"
     """连接模式，支持ws和tcp"""
 
     use_wss: bool = False