diff --git a/machine.go b/machine.go
index 8ddf63f..d6becc1 100644
--- a/machine.go
+++ b/machine.go
@@ -54,7 +54,12 @@ 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")
+	if m.Upgrade {
+		fmt.Fprintln(w, "apt update")
+		m.Upgrade = false
+	} else {
+		fmt.Fprintln(w, "upgrade")
+	}
 	// log.Info("update machine protobuf", hostname)
 	updateMachine(newm)
 }