diff --git a/README.md b/README.md
index 2a4967bb..26ddf8df 100644
--- a/README.md
+++ b/README.md
@@ -83,6 +83,7 @@ source <(curl -sL https://git.io/fNgqx) --remove
 所有命令行参数支持**Tab**补全  
 ```bash
    v2ray -h                   查看帮助
+   v2ray -v                   查看版本信息
    v2ray start                启动 V2Ray
    v2ray stop                 停止 V2Ray
    v2ray restart              重启 V2Ray
@@ -127,7 +128,7 @@ source <(curl -sL https://git.io/fNgqx) --remove
 **不支持Centos 6**
 
 ## 更新日志
-**2018.11.29**  
+[**2018.11.29**](https://github.com/Jrohy/multi-v2ray/tree/v2.4)   
 加入更新v2ray到特定版本的指令
 
 **2018.11.28**  
@@ -136,14 +137,14 @@ source <(curl -sL https://git.io/fNgqx) --remove
 **2018.11.25**  
 加入Flask Web接口
 
-**2018.11.19**  
+[**2018.11.19**](https://github.com/Jrohy/multi-v2ray/tree/v2.2)  
 加入禁止BT
 
-**2018.11.18**  
+[**2018.11.18**](https://github.com/Jrohy/multi-v2ray/tree/v2.1)  
 支持新版v2ray配置文件格式(v4.1+), 升级脚本自动转换格式为新版  
 支持范围端口修改
 
-**2018.10.9**  
+[**2018.10.9**](https://github.com/Jrohy/multi-v2ray/tree/v2.0)  
 面向对象 来重构代码  
 加入json文件缓存(利用序列化实现)
 
diff --git a/multi-v2ray.sh b/multi-v2ray.sh
index 7b470f79..3713ca32 100644
--- a/multi-v2ray.sh
+++ b/multi-v2ray.sh
@@ -12,12 +12,14 @@ BEGIN_PATH=$(pwd)
 INSTARLL_WAY=0
 
 #定义操作变量, 0为否, 1为是
-DEV_MODE=0
-
 HELP=0
 
 REMOVE=0
 
+FORCE=0
+
+UPDATE_VERSION=""
+
 APP_PATH="/usr/local/multi-v2ray"
 
 #Centos 临时取消别名
@@ -44,6 +46,13 @@ while [[ $# > 0 ]];do
         -h|--help)
         HELP=1
         ;;
+        -f|--force)
+        FORCE=1
+        ;;
+        -v|--version)
+        UPDATE_VERSION="$2"
+        shift
+        ;;
         -k|--keep)
         INSTARLL_WAY=1
         colorEcho ${BLUE} "当前以keep保留配置文件形式更新, 若失败请用全新安装\n"
@@ -52,10 +61,6 @@ while [[ $# > 0 ]];do
         INSTARLL_WAY=2
         colorEcho ${BLUE} "当前仅更新multi-v2ray源码\n"
         ;;
-        -d|--dev)
-        DEV_MODE=1
-        colorEcho ${BLUE} "当前为开发模式, 用dev分支来更新\n"
-        ;;
         *)
                 # unknown option
         ;;
@@ -64,12 +69,30 @@ while [[ $# > 0 ]];do
 done
 #############################
 
+checkUpdate(){
+    LASTEST_VERSION=$(curl -H 'Cache-Control: no-cache' -s "https://api.github.com/repos/Jrohy/multi-v2ray/releases/latest" | grep 'tag_name' | cut -d\" -f4)
+
+    if [[ -e /usr/local/bin/v2ray ]];then
+        VERSION_TEMP_VALUE=$(cat /usr/local/bin/v2ray|grep SHELL_V2RAY|awk 'NR==1')
+        if [[ ! -z $VERSION_TEMP_VALUE ]]; then
+            CURRENT_VERSION=${VERSION_TEMP_VALUE/*=}
+            if [[ $LASTEST_VERSION == $CURRENT_VERSION ]]; then
+                colorEcho $GREEN "脚本已为最新!!"
+                exit
+            fi
+        fi
+    fi
+
+    [[ -z $UPDATE_VERSION ]] && UPDATE_VERSION=$LASTEST_VERSION
+}
+
 help(){
-    echo "source multi-v2ray.sh [-h|--help] [-k|--keep] [-d|--dev][-c|--code][--remove]"
+    echo "source multi-v2ray.sh [-h|--help] [-k|--keep] [-c|--code] [-f|--force] [--remove]"
     echo "  -h, --help           Show help"
     echo "  -k, --keep           keep the v2ray config.json to update"
-    echo "  -d, --dev            update from dev branch"
     echo "  -c, --code           only update multi-v2ray code"
+    echo "  -f, --force          force to update multi-v2ray lastest code"
+    echo "  -v, --version        update multi-v2ray to special version"
     echo "      --remove         remove v2ray && multi-v2ray"
     echo "                       no params to new install"
     return 0
@@ -191,21 +214,18 @@ updateProject() {
         DOMAIN=${TEMP_VALUE/*=}
     fi
 
-    [[ $DEV_MODE == 1 ]] && BRANCH="dev" || BRANCH="master"
-
     cd /usr/local/
     if [[ -e multi-v2ray && -e multi-v2ray/.git ]];then
         cd multi-v2ray
 
         FIR_COMMIT_AUTHOR=$(git log --reverse | awk 'NR==2'| awk '{print $2}')
         if [[ $FIR_COMMIT_AUTHOR == 'Jrohy' ]];then
-            git reset --hard HEAD && git clean -d -f
-            if [[ $DEV_MODE == 1 ]];then
-                git checkout dev >/dev/null 2>&1
-            else 
-                git checkout master >/dev/null 2>&1
+            git reset --hard HEAD && git clean -d -f && git checkout master >/dev/null 2>&1
+            if [[ $FORCE == 1 ]]; then
+                git pull
+            else
+                git fetch origin && git checkout $UPDATE_VERSION
             fi
-            git pull
         else
             cd /usr/local/
             rm -rf multi-v2ray
@@ -244,7 +264,7 @@ timeSync() {
 
 profileInit() {
     #配置V2ray初始环境
-    cp $APP_PATH/v2ray /usr/local/bin
+    cp -f $APP_PATH/v2ray /usr/local/bin
     chmod +x /usr/local/bin/v2ray
 
     #加入multi-v2ray模块搜索路径
@@ -302,6 +322,8 @@ main() {
 
     [[ ${REMOVE} == 1 ]] && removeV2Ray && return
 
+    checkUpdate
+
     [[ ${INSTARLL_WAY} == 0 ]] && colorEcho ${BLUE} "当前为全新安装\n"
 
     if [[ ${INSTARLL_WAY} != 2 ]];then 
diff --git a/v2ray b/v2ray
index e4fb460e..59d4a23a 100755
--- a/v2ray
+++ b/v2ray
@@ -1,5 +1,7 @@
 #!/bin/bash
 
+SHELL_V2RAY="v2.5.0"
+
 #######color code########
 RED="31m"      # Error message
 GREEN="32m"    # Success message
@@ -13,6 +15,12 @@ colorEcho(){
     echo -e "\033[${COLOR}${@:2}\033[0m"
 }
 
+showVersion(){
+    echo -e "multi-v2ray: $(colorEcho $GREEN $SHELL_V2RAY)\n"
+    V2RAY_VERSION=$(/usr/bin/v2ray/v2ray -version | head -n 1 | cut -d " " -f2-4)
+    echo -e "v2ray: $(colorEcho $GREEN $V2RAY_VERSION)\n"
+}
+
 cleanLog() {
     cat /dev/null > /var/log/v2ray/access.log
     cat /dev/null > /var/log/v2ray/error.log
@@ -23,8 +31,9 @@ cleanLog() {
 [ $(id -u) != "0" ] && { colorEcho ${RED} "Error: You must be root to run this script"; exit 1; }
 
 help(){
-    echo "v2ray [-h|--help] [options]"
+    echo "v2ray [-h|--help] [-v|--version] [options]"
     echo "  -h, --help           查看帮助"
+    echo "  -v, --version        查看版本信息"
     echo "  start                启动 V2Ray"
     echo "  stop                 停止 V2Ray"
     echo "  restart              重启 V2Ray"
@@ -56,6 +65,9 @@ while [[ $# > 0 ]];do
         -h|--help)
         help
         ;;
+        -v|--version)
+        showVersion
+        ;;
         start)
         service v2ray start
         colorEcho ${GREEN} "v2ray启动成功!"
@@ -127,6 +139,7 @@ while [[ $# > 0 ]];do
         ;;
         *)
         colorEcho ${YELLOW} "传参有误! 输入-h 或者--help查看帮助"  # unknown option
+        ;;
     esac
     shift # past argument or value
 done
diff --git a/v2ray.bash b/v2ray.bash
index 66c61ea4..13fd3861 100644
--- a/v2ray.bash
+++ b/v2ray.bash
@@ -1,6 +1,6 @@
 # bash completion for v2ray                             -*- shell-script -*-
 function _auto_tab() {
-	local options_array=("start" "stop" "restart" "status" "log" "update" "update.sh" "add" "del" "info" "port" "tls" "tfo" "stream" "stats" "clean" "-h")
+	local options_array=("start" "stop" "restart" "status" "log" "update" "update.sh" "add" "del" "info" "port" "tls" "tfo" "stream" "stats" "clean" "-h" "-v")
 	local add_array=("wechat" "utp" "srtp" "dtls" "wireguard" "socks" "mtproto" "ss")
 	local cur pre