diff --git a/ShadowsocksX-NG/start_kcptun.sh b/ShadowsocksX-NG/start_kcptun.sh
index 3ca2463..64e98f4 100755
--- a/ShadowsocksX-NG/start_kcptun.sh
+++ b/ShadowsocksX-NG/start_kcptun.sh
@@ -6,5 +6,6 @@
 #  Created by 邱宇舟 on 2017/1/11.
 #  Copyright © 2017年 qiuyuzhou. All rights reserved.
 
+chmod 444 "$HOME/Library/LaunchAgents/com.qiuyuzhou.shadowsocksX-NG.kcptun.plist"
 launchctl load "$HOME/Library/LaunchAgents/com.qiuyuzhou.shadowsocksX-NG.kcptun.plist"
 launchctl start com.qiuyuzhou.shadowsocksX-NG.kcptun
diff --git a/ShadowsocksX-NG/start_privoxy.sh b/ShadowsocksX-NG/start_privoxy.sh
index dbc7d7b..ed1ab64 100755
--- a/ShadowsocksX-NG/start_privoxy.sh
+++ b/ShadowsocksX-NG/start_privoxy.sh
@@ -6,5 +6,6 @@
 #  Created by 王晨 on 16/10/7.
 #  Copyright © 2016年 zhfish. All rights reserved.
 
+chmod 444 "$HOME/Library/LaunchAgents/com.qiuyuzhou.shadowsocksX-NG.http.plist"
 launchctl load "$HOME/Library/LaunchAgents/com.qiuyuzhou.shadowsocksX-NG.http.plist"
 launchctl start com.qiuyuzhou.shadowsocksX-NG.http
diff --git a/ShadowsocksX-NG/start_ss_local.sh b/ShadowsocksX-NG/start_ss_local.sh
index a59973e..31b3593 100755
--- a/ShadowsocksX-NG/start_ss_local.sh
+++ b/ShadowsocksX-NG/start_ss_local.sh
@@ -6,5 +6,6 @@
 #  Created by 邱宇舟 on 16/6/6.
 #  Copyright © 2016年 qiuyuzhou. All rights reserved.
 
+chmod 444 "$HOME/Library/LaunchAgents/com.qiuyuzhou.shadowsocksX-NG.local.plist"
 launchctl load "$HOME/Library/LaunchAgents/com.qiuyuzhou.shadowsocksX-NG.local.plist"
 launchctl start com.qiuyuzhou.shadowsocksX-NG.local