diff --git a/ShadowsocksX-NG/install_helper.sh b/ShadowsocksX-NG/install_helper.sh
index 606fe6d..c27a00e 100755
--- a/ShadowsocksX-NG/install_helper.sh
+++ b/ShadowsocksX-NG/install_helper.sh
@@ -10,5 +10,6 @@ sudo mkdir -p "/Library/Application Support/ShadowsocksX-NG/"
 sudo cp proxy_conf_helper "/Library/Application Support/ShadowsocksX-NG/"
 sudo chown root:admin "/Library/Application Support/ShadowsocksX-NG/proxy_conf_helper"
 sudo chmod a+rx "/Library/Application Support/ShadowsocksX-NG/proxy_conf_helper"
+sudo chmod +s "/Library/Application Support/ShadowsocksX-NG/proxy_conf_helper"
 
 echo done