diff --git a/shadowsocks b/shadowsocks
index 372caec..aa38676 100644
--- a/shadowsocks
+++ b/shadowsocks
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 # chkconfig: 2345 90 10
 # description: Start or stop the Shadowsocks server
 #
diff --git a/shadowsocks-debian b/shadowsocks-debian
index faf86a9..0490f4b 100644
--- a/shadowsocks-debian
+++ b/shadowsocks-debian
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 ### BEGIN INIT INFO
 # Provides:          shadowsocks
 # Required-Start:    $network $local_fs $remote_fs
diff --git a/shadowsocksR b/shadowsocksR
index 25657ac..0c772da 100644
--- a/shadowsocksR
+++ b/shadowsocksR
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 # chkconfig: 2345 90 10
 # description: start or stop the ShadowsocksR server
 #
diff --git a/shadowsocksR-debian b/shadowsocksR-debian
index 1e3804c..b47d79c 100644
--- a/shadowsocksR-debian
+++ b/shadowsocksR-debian
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 ### BEGIN INIT INFO
 # Provides:          ShadowsocksR
 # Required-Start:    $network $local_fs $remote_fs