diff --git a/etc/icinga2/scripts/mail-host-notification.sh b/etc/icinga2/scripts/mail-host-notification.sh
index 2a2c011f6..744481a77 100755
--- a/etc/icinga2/scripts/mail-host-notification.sh
+++ b/etc/icinga2/scripts/mail-host-notification.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env bash
 # Icinga 2 | (c) 2012 Icinga GmbH | GPLv2+
 # Except of function urlencode which is Copyright (C) by Brian White (brian@aljex.com) used under MIT license
 
diff --git a/etc/icinga2/scripts/mail-service-notification.sh b/etc/icinga2/scripts/mail-service-notification.sh
index c901f234d..8e560ac23 100755
--- a/etc/icinga2/scripts/mail-service-notification.sh
+++ b/etc/icinga2/scripts/mail-service-notification.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env bash
 # Icinga 2 | (c) 2012 Icinga GmbH | GPLv2+
 # Except of function urlencode which is Copyright (C) by Brian White (brian@aljex.com) used under MIT license