diff --git a/bw-dev b/bw-dev
index 8e962761e..8b0bbb3f3 100755
--- a/bw-dev
+++ b/bw-dev
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # exit on errors
 set -e
diff --git a/update.sh b/update.sh
index a394eed81..727ce1b24 100755
--- a/update.sh
+++ b/update.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -e
 
 # determine inital and target versions