diff --git a/config.py b/config.py
index f55826ca8f28ed184839a4f8e588dc9945d20f8a..e39a500875acdd9b37996bfeca52b17521c8c91f 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 50fb78a7b3161707d0c0cbc6fcdb8451e3151c7a..811d6141e1b3aabd5b8b0c6eb354c7bc712f192d 100644
--- a/main.py
+++ b/main.py
@@ -92,6 +92,9 @@ 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)