diff --git a/src/main/java/cn/dancingsnow/dglab/api/Connection.java b/src/main/java/cn/dancingsnow/dglab/api/Connection.java
index f795dc7..fd93227 100644
--- a/src/main/java/cn/dancingsnow/dglab/api/Connection.java
+++ b/src/main/java/cn/dancingsnow/dglab/api/Connection.java
@@ -87,7 +87,7 @@ public void sendMessage(String message) {
     }
 
     public void disconnect() {
-        sendMessage(new DgLabMessage(DgLabMessageType.BREAK, clientId, targetId, ""));
+        sendMessage(new DgLabMessage(DgLabMessageType.BREAK, clientId, targetId, "209"));
         channel.close();
     }