diff --git a/register/InstancePing.proto b/register/InstancePing.proto
index 9d9069b91f3c3dc5f436e2a3e3ea4a205fba350e..3a332a6bf26408f00e006f0064fed48e955e9653 100644
--- a/register/InstancePing.proto
+++ b/register/InstancePing.proto
@@ -32,4 +32,5 @@ service ServiceInstancePing {
 message ServiceInstancePingPkg {
     int32 serviceInstanceId = 1;
     int64 time = 2;
+    string serviceInstanceUUID = 3;
 }