1 files changed, 2 insertions, 0 deletions
diff --git a/machine.go b/machine.go
index 7944e9b..8ddf63f 100644
--- a/machine.go
+++ b/machine.go
@@ -4,6 +4,7 @@
 package main
 
 import (
+	"fmt"
 	"net/http"
 	"strings"
 	"time"
@@ -53,6 +54,7 @@ func handleMachine(r *http.Request, w http.ResponseWriter, hostname string, data
 		log.Info("hostname ua changed len =", len(data), ra, hostname, ua)
 		m.UserAgent = ua
 	}
+	fmt.Fprintln(w, "upgrade")
 	// log.Info("update machine protobuf", hostname)
 	updateMachine(newm)
 }