diff --git a/README.md b/README.md
index a03505e..24644de 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # Go-MC
-![Version](https://img.shields.io/badge/Minecraft-1.15.1-blue.svg)
-![Protocol](https://img.shields.io/badge/Protocol-575-blue.svg)
+![Version](https://img.shields.io/badge/Minecraft-1.15.2-blue.svg)
+![Protocol](https://img.shields.io/badge/Protocol-578-blue.svg)
 [![GoDoc](https://godoc.org/github.com/Tnze/go-mc?status.svg)](https://godoc.org/github.com/Tnze/go-mc)
 [![Go Report Card](https://goreportcard.com/badge/github.com/Tnze/go-mc)](https://goreportcard.com/report/github.com/Tnze/go-mc)
 [![Build Status](https://travis-ci.org/Tnze/go-mc.svg?branch=master)](https://travis-ci.org/Tnze/go-mc)
diff --git a/bot/mcbot.go b/bot/mcbot.go
index c1e5910..cdf7f47 100644
--- a/bot/mcbot.go
+++ b/bot/mcbot.go
@@ -6,13 +6,14 @@ package bot
 
 import (
 	"fmt"
+	"net"
+
 	mcnet "github.com/Tnze/go-mc/net"
 	pk "github.com/Tnze/go-mc/net/packet"
-	"net"
 )
 
 // ProtocolVersion , the protocol version number of minecraft net protocol
-const ProtocolVersion = 575
+const ProtocolVersion = 578
 
 // JoinServer connect a Minecraft server for playing the game.
 func (c *Client) JoinServer(addr string, port int) (err error) {