diff --git a/utils/ccs-injection.bash b/utils/ccs-injection.bash
index 7302309..ff672ec 100755
--- a/utils/ccs-injection.bash
+++ b/utils/ccs-injection.bash
@@ -1,4 +1,4 @@
-#!/bin/bash 
+#!/usr/bin/env bash
 
 # POC bash socket implementation of CCS Injection vulnerability in OpenSSL (CVE-2014-0224), 
 # see https://www.openssl.org/news/secadv_20140605.txt
diff --git a/utils/checkcert.sh b/utils/checkcert.sh
index 43d6976..58866c5 100755
--- a/utils/checkcert.sh
+++ b/utils/checkcert.sh
@@ -1,4 +1,4 @@
-#!/bin/bash 
+#!/usr/bin/env bash
 
 
 # on the command line:
diff --git a/utils/docker-nginx.tls13-earlydata.start.sh b/utils/docker-nginx.tls13-earlydata.start.sh
index ebed9e2..06a86a0 100755
--- a/utils/docker-nginx.tls13-earlydata.start.sh
+++ b/utils/docker-nginx.tls13-earlydata.start.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 image="rsnow/nginx"
 docker pull $image
diff --git a/utils/heartbleed.bash b/utils/heartbleed.bash
index c2bd122..c8bdbe8 100755
--- a/utils/heartbleed.bash
+++ b/utils/heartbleed.bash
@@ -1,4 +1,4 @@
-#!/bin/bash 
+#!/usr/bin/env bash
 
 # POC bash socket implementation of heartbleed (CVE-2014-0160), see also http://heartbleed.com/
 # Author: Dirk Wetter, GPLv2 see https://testssl.sh/LICENSE.txt 
diff --git a/utils/hexstream2cipher.sh b/utils/hexstream2cipher.sh
index 527f20c..98c6f64 100755
--- a/utils/hexstream2cipher.sh
+++ b/utils/hexstream2cipher.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 hs="$1"
 len=${#hs}
diff --git a/utils/hexstream2curves.sh b/utils/hexstream2curves.sh
index f62e154..8528b5c 100755
--- a/utils/hexstream2curves.sh
+++ b/utils/hexstream2curves.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 hs="$1"
 len=${#hs}
diff --git a/utils/make-openssl111.sh b/utils/make-openssl111.sh
index 818a166..59835c1 100755
--- a/utils/make-openssl111.sh
+++ b/utils/make-openssl111.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 #  vim:tw=90:ts=5:sw=5
 #
diff --git a/utils/resume.sh b/utils/resume.sh
index ccd2b2c..092f2d6 100755
--- a/utils/resume.sh
+++ b/utils/resume.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # simple check for seesion resumption 1) by SID, 2) by tickets
 # Author: Dirk Wetter, GPLv2 see https://testssl.sh/LICENSE.txt
diff --git a/utils/ticketbleed.bash b/utils/ticketbleed.bash
index 0feaa89..50bf9c5 100755
--- a/utils/ticketbleed.bash
+++ b/utils/ticketbleed.bash
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # Fast and reliable POC bash socket implementation of ticketbleed (CVE-2016-9244), see also http://ticketbleed.com/
 # Author: Dirk Wetter, GPLv2 see https://testssl.sh/LICENSE.txt