diff --git a/vpnsetup.sh b/vpnsetup.sh
index 9f57946..65e2e2f 100644
--- a/vpnsetup.sh
+++ b/vpnsetup.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env sh
 #
 # Script for automatic setup of an IPsec/L2TP VPN server on Ubuntu LTS and Debian 8.
 # Works on dedicated servers and any KVM- or Xen-based Virtual Private Server (VPS).
diff --git a/vpnsetup_centos.sh b/vpnsetup_centos.sh
index 71fbe7d..8135289 100644
--- a/vpnsetup_centos.sh
+++ b/vpnsetup_centos.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env sh
 #
 # Script for automatic setup of an IPsec/L2TP VPN server on 64-bit CentOS/RHEL 6 & 7.
 # Works on dedicated servers and any KVM- or Xen-based Virtual Private Server (VPS).
diff --git a/vpnupgrade_Libreswan.sh b/vpnupgrade_Libreswan.sh
index 2adc40c..b7053d9 100644
--- a/vpnupgrade_Libreswan.sh
+++ b/vpnupgrade_Libreswan.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env sh
 #
 # Script to upgrade Libreswan on Ubuntu and Debian
 #
diff --git a/vpnupgrade_Libreswan_centos.sh b/vpnupgrade_Libreswan_centos.sh
index e69b25b..1c4e25a 100644
--- a/vpnupgrade_Libreswan_centos.sh
+++ b/vpnupgrade_Libreswan_centos.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env sh
 #
 # Script to upgrade Libreswan on CentOS and RHEL
 #