diff --git a/config.py b/config.py
index 0dac4f2e00032e9ec29dbb1da6730bdf0ea5a6fd..54f0e3b5bf73b1e38ae3a65b54a462c7443aabd5 100644
--- a/config.py
+++ b/config.py
@@ -21,7 +21,7 @@ OIWIKI_LIST_URL = "https://raw.githubusercontent.com/ZhehaoMi/countdown/master/w
 #一句话被重复几次后会进行复读
 REPEAT_TIME_LIMIT=3
 #指令前缀
-COMMAND_PREFIX=[":","："]
+COMMAND_PREFIX=["--","!!"]
 SAMPLE = {
     "718459861": [
         {
diff --git a/main.py b/main.py
index e90fb79242f4c2b2b0ea583991066189345cf5c7..0bf745da839d836660a258e5bb023bd92da5e012 100644
--- a/main.py
+++ b/main.py
@@ -101,6 +101,8 @@ def handle_message(context):
             if command[0] in commands:
                 commands[command[0]][1].__call__(
                     bot, context, command)
+            else:
+                bot.send(context,"未知指令: %s"%command[0])
         if text is not None:
             for listener in message_listeners:
                 listener.__call__(bot, context, text)