diff --git a/rpn.go b/rpn.go
index 4b1d397..64126b2 100644
--- a/rpn.go
+++ b/rpn.go
@@ -24,6 +24,9 @@ func rpnNotify(w http.ResponseWriter, r *http.Request) {
 		log.Printf("failed to add rpnIn %+v , error is %s", ri, err.Error())
 	}
 	fmt.Fprintf(w, "[SUCCESS]")
+
+	//start informing leanwork in separate thread, maximum 5 retry, interval 5 minutes
+	go startLeanworkCallBack(ri)
 	return
 }