diff --git a/model/css-rddaniel.sh b/model/css-rddaniel.sh
index b08a81a..da28805 100644
--- a/model/css-rddaniel.sh
+++ b/model/css-rddaniel.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # Copyright (c) 2020, Arm Limited. All rights reserved.
 #
diff --git a/model/css-rdn1edgex2.sh b/model/css-rdn1edgex2.sh
index 61d4cef..48b9c04 100644
--- a/model/css-rdn1edgex2.sh
+++ b/model/css-rdn1edgex2.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # Copyright (c) 2020, Arm Limited. All rights reserved.
 #