diff --git a/hack/boilerplate/add-boilerplate.sh b/hack/boilerplate/add-boilerplate.sh
index 6ba526ac..f642f2f7 100755
--- a/hack/boilerplate/add-boilerplate.sh
+++ b/hack/boilerplate/add-boilerplate.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # Copyright 2018 The Knative Authors
 #
diff --git a/hack/boilerplate/boilerplate.sh.txt b/hack/boilerplate/boilerplate.sh.txt
index 85b47611..e05a3636 100644
--- a/hack/boilerplate/boilerplate.sh.txt
+++ b/hack/boilerplate/boilerplate.sh.txt
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # Copyright 2018 The Knative Authors
 #
diff --git a/hack/update-codegen.sh b/hack/update-codegen.sh
index 60960615..165b2b80 100755
--- a/hack/update-codegen.sh
+++ b/hack/update-codegen.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # Copyright 2018 The Knative Authors
 #
diff --git a/hack/update-deps.sh b/hack/update-deps.sh
index 06bcf11e..856520a8 100755
--- a/hack/update-deps.sh
+++ b/hack/update-deps.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # Copyright 2018 The Knative Authors
 #
diff --git a/hack/verify-codegen.sh b/hack/verify-codegen.sh
index 6853769d..5e48a4e6 100755
--- a/hack/verify-codegen.sh
+++ b/hack/verify-codegen.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # Copyright 2018 The Knative Authors
 #
diff --git a/test/presubmit-tests.sh b/test/presubmit-tests.sh
index 7d8a3238..296bb413 100755
--- a/test/presubmit-tests.sh
+++ b/test/presubmit-tests.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # Copyright 2018 The Knative Authors
 #