diff --git a/src/onebot11/action/file/GetOnlineClient.ts b/src/onebot11/action/file/GetOnlineClient.ts
index b1ff2585..a5b6dbb2 100644
--- a/src/onebot11/action/file/GetOnlineClient.ts
+++ b/src/onebot11/action/file/GetOnlineClient.ts
@@ -1,7 +1,7 @@
 import BaseAction from '../BaseAction';
 import { ActionName } from '../types';
 export class GetOnlineClient extends BaseAction<void, Array<any>> {
-  actionName = ActionName.GetRobotUinRange;
+  actionName = ActionName.GetOnlineClient;
 
   protected async _handle(payload: void) {
 
diff --git a/src/proto/SysMessage.DeviceChange.proto b/src/proto/SysMessage.DeviceChange.proto
new file mode 100644
index 00000000..3ea5cceb
--- /dev/null
+++ b/src/proto/SysMessage.DeviceChange.proto
@@ -0,0 +1,32 @@
+syntax = "proto3";
+package SysMessage;
+message Data  {
+    repeated Header header = 1;
+    repeated Body body = 2;
+    repeated Event event = 3;
+}
+message Event {
+   repeated Content content = 2;
+}
+message Devices {
+  string deviceName = 5;
+  string appname = 9;
+}
+message Content {
+repeated Devices devices = 5;
+}
+message Header {
+        uint32  PeerNumber = 1;
+        string PeerString = 2;
+        uint32   Uin = 5;
+        optional string Uid = 6;
+ }  
+message Body {
+        uint32  MsgType = 1;
+        uint32  SubType_0 = 2;
+        uint32  SubType_1 = 3;
+        uint32  MsgSeq=  5;
+        uint32  Time = 6;
+        uint64  MsgID = 12;
+        uint32  Other = 13;
+}
\ No newline at end of file