diff --git a/ShadowsocksX-NG/LaunchAgentUtils.swift b/ShadowsocksX-NG/LaunchAgentUtils.swift
index 2dca183..721a4d7 100644
--- a/ShadowsocksX-NG/LaunchAgentUtils.swift
+++ b/ShadowsocksX-NG/LaunchAgentUtils.swift
@@ -9,7 +9,7 @@
 import Foundation
 
 let SS_LOCAL_VERSION = "2.5.6"
-let KCPTUN_CLIENT_VERSION = "20161222"
+let KCPTUN_CLIENT_VERSION = "20170117"
 let PRIVOXY_VERSION = "3.0.26.static"
 let APP_SUPPORT_DIR = "/Library/Application Support/ShadowsocksX-NG/"
 let LAUNCH_AGENT_DIR = "/Library/LaunchAgents/"
diff --git a/ShadowsocksX-NG/install_kcptun.sh b/ShadowsocksX-NG/install_kcptun.sh
index efd72f5..cffd51f 100755
--- a/ShadowsocksX-NG/install_kcptun.sh
+++ b/ShadowsocksX-NG/install_kcptun.sh
@@ -7,9 +7,9 @@
 #  Copyright © 2017年 qiuyuzhou. All rights reserved.
 
 cd `dirname "${BASH_SOURCE[0]}"`
-mkdir -p "$HOME/Library/Application Support/ShadowsocksX-NG/kcptun_20161222"
-cp -f kcptun_client "$HOME/Library/Application Support/ShadowsocksX-NG/kcptun_20161222/"
+mkdir -p "$HOME/Library/Application Support/ShadowsocksX-NG/kcptun_20170117"
+cp -f kcptun_client "$HOME/Library/Application Support/ShadowsocksX-NG/kcptun_20170117/"
 rm -f "$HOME/Library/Application Support/ShadowsocksX-NG/kcptun_client"
-ln -s "$HOME/Library/Application Support/ShadowsocksX-NG/kcptun_20161222/kcptun_client" "$HOME/Library/Application Support/ShadowsocksX-NG/kcptun_client"
+ln -s "$HOME/Library/Application Support/ShadowsocksX-NG/kcptun_20170117/kcptun_client" "$HOME/Library/Application Support/ShadowsocksX-NG/kcptun_client"
 
 echo "install kcptun done"
diff --git a/ShadowsocksX-NG/kcptun_client b/ShadowsocksX-NG/kcptun_client
index af13c85..4352b2a 100755
Binary files a/ShadowsocksX-NG/kcptun_client and b/ShadowsocksX-NG/kcptun_client differ