diff --git a/demo/async/run.sh b/demo/async/run.sh
index 856fea9f..b5128eb0 100755
--- a/demo/async/run.sh
+++ b/demo/async/run.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 ADDR=ipc:///tmp/async_demo
 COUNT=10
diff --git a/etc/codecov.sh b/etc/codecov.sh
index 5ecdc55f..7bddcd50 100755
--- a/etc/codecov.sh
+++ b/etc/codecov.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # Copyright 2017 Garrett D'Amore <garrett@damore.org>
 # Copyright 2017 Capitar IT Group BV <info@capitar.com>
diff --git a/etc/coverage.sh b/etc/coverage.sh
index 6f7355dc..73e71098 100755
--- a/etc/coverage.sh
+++ b/etc/coverage.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # Copyright 2017 Garrett D'Amore <garrett@damore.org>
 # Copyright 2017 Capitar IT Group BV <info@capitar.com>
diff --git a/etc/format-check.sh b/etc/format-check.sh
index 68b3d8eb..aca847c9 100755
--- a/etc/format-check.sh
+++ b/etc/format-check.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env bash
 #
 # Copyright 2016 Garrett D'Amore <garrett@damore.org>
 #
diff --git a/src/tools/nngcat/nngcat_ambiguous_test.sh b/src/tools/nngcat/nngcat_ambiguous_test.sh
index 414b6d19..944d5aed 100755
--- a/src/tools/nngcat/nngcat_ambiguous_test.sh
+++ b/src/tools/nngcat/nngcat_ambiguous_test.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 #
 # Copyright 2018 Staysail Systems, Inc. <info@staysail.tech>
diff --git a/src/tools/nngcat/nngcat_async_test.sh b/src/tools/nngcat/nngcat_async_test.sh
index 2b03e522..aeec3de2 100755
--- a/src/tools/nngcat/nngcat_async_test.sh
+++ b/src/tools/nngcat/nngcat_async_test.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 #
 # Copyright 2018 Staysail Systems, Inc. <info@staysail.tech>
diff --git a/src/tools/nngcat/nngcat_dup_proto_test.sh b/src/tools/nngcat/nngcat_dup_proto_test.sh
index 1513d01c..a55b7f3b 100755
--- a/src/tools/nngcat/nngcat_dup_proto_test.sh
+++ b/src/tools/nngcat/nngcat_dup_proto_test.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 #
 # Copyright 2018 Staysail Systems, Inc. <info@staysail.tech>
diff --git a/src/tools/nngcat/nngcat_help_test.sh b/src/tools/nngcat/nngcat_help_test.sh
index 95ed9e3e..77b75034 100755
--- a/src/tools/nngcat/nngcat_help_test.sh
+++ b/src/tools/nngcat/nngcat_help_test.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 #
 # Copyright 2018 Staysail Systems, Inc. <info@staysail.tech>
diff --git a/src/tools/nngcat/nngcat_incompat_test.sh b/src/tools/nngcat/nngcat_incompat_test.sh
index 128b57ba..93b75488 100755
--- a/src/tools/nngcat/nngcat_incompat_test.sh
+++ b/src/tools/nngcat/nngcat_incompat_test.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env bash
 
 #
 # Copyright 2018 Staysail Systems, Inc. <info@staysail.tech>
diff --git a/src/tools/nngcat/nngcat_pubsub_test.sh b/src/tools/nngcat/nngcat_pubsub_test.sh
index b9ba90ed..52d35a92 100755
--- a/src/tools/nngcat/nngcat_pubsub_test.sh
+++ b/src/tools/nngcat/nngcat_pubsub_test.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 #
 # Copyright 2018 Staysail Systems, Inc. <info@staysail.tech>
diff --git a/src/tools/nngcat/nngcat_recvmaxsz_test.sh b/src/tools/nngcat/nngcat_recvmaxsz_test.sh
index b5d4ff4a..a41a02c0 100755
--- a/src/tools/nngcat/nngcat_recvmaxsz_test.sh
+++ b/src/tools/nngcat/nngcat_recvmaxsz_test.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 #
 # Copyright 2018 Staysail Systems, Inc. <info@staysail.tech>
diff --git a/src/tools/nngcat/nngcat_stdin_pipe_test.sh b/src/tools/nngcat/nngcat_stdin_pipe_test.sh
index 5fec0ab7..824107e4 100755
--- a/src/tools/nngcat/nngcat_stdin_pipe_test.sh
+++ b/src/tools/nngcat/nngcat_stdin_pipe_test.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 #
 # Copyright 2018 Staysail Systems, Inc. <info@staysail.tech>
diff --git a/src/tools/nngcat/nngcat_unlimited_test.sh b/src/tools/nngcat/nngcat_unlimited_test.sh
index 0486b9b1..88a1e309 100755
--- a/src/tools/nngcat/nngcat_unlimited_test.sh
+++ b/src/tools/nngcat/nngcat_unlimited_test.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 #
 # Copyright 2018 Staysail Systems, Inc. <info@staysail.tech>