diff --git a/README.md b/README.md
index 881522b..d161efb 100644
--- a/README.md
+++ b/README.md
@@ -26,19 +26,11 @@ if err != nil {
 	os.Exit(1)
 }
 p.AddIPAddr(ra)
-err = p.AddHandler("receive", func(addr *net.IPAddr, rtt time.Duration) {
+p.OnRecv = func(addr *net.IPAddr, rtt time.Duration) {
 	fmt.Printf("IP Addr: %s receive, RTT: %v\n", addr.String(), rtt)
-})
-if err != nil {
-	fmt.Println(err)
-	os.Exit(1)
 }
-err = p.AddHandler("idle", func() {
+p.OnIdle = func() {
 	fmt.Println("finish")
-})
-if err != nil {
-	fmt.Println(err)
-	os.Exit(1)
 }
 err = p.Run()
 if err != nil {