diff --git a/chatgpt-on-wechat/config.json b/chatgpt-on-wechat/config.json
index 5f1a3e0..eb9ebe4 100644
--- a/chatgpt-on-wechat/config.json
+++ b/chatgpt-on-wechat/config.json
@@ -11,7 +11,8 @@
     "text_to_voice": "openai",
     "proxy": "",
     "hot_reload": true,
-    "single_chat_prefix": [""],
+    "group_at_off": false,
+    "single_chat_prefix": ["bot", "@bot"],
     "single_chat_reply_prefix": "[bot]",
     "group_chat_prefix": [
         "@bot"