diff --git a/tools/build b/tools/build
index 4f66902..1aca25b 100755
--- a/tools/build
+++ b/tools/build
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -e
 
diff --git a/tools/build-loop b/tools/build-loop
index 5384701..02d70d5 100755
--- a/tools/build-loop
+++ b/tools/build-loop
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 TRAPPING=0
 trap "{ echo finishing; TRAPPING=1; }" SIGINT
diff --git a/tools/format b/tools/format
index 457b13f..c104525 100755
--- a/tools/format
+++ b/tools/format
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -eo pipefail
 
diff --git a/tools/generate b/tools/generate
index af897e5..be41375 100755
--- a/tools/generate
+++ b/tools/generate
@@ -1,3 +1,3 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 exec go run tools/generate.go $@
diff --git a/tools/measure b/tools/measure
index f62c578..39d583b 100755
--- a/tools/measure
+++ b/tools/measure
@@ -1,3 +1,3 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 exec go run tools/measure.go
diff --git a/tools/serve b/tools/serve
index baf68d1..1d4b594 100755
--- a/tools/serve
+++ b/tools/serve
@@ -1,3 +1,3 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 exec go run tools/serve.go
diff --git a/tools/test b/tools/test
index c0c9c55..c380515 100755
--- a/tools/test
+++ b/tools/test
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # Sanity testing of the examples.
 
diff --git a/tools/upload b/tools/upload
index 5ca34ef..c00a2ab 100755
--- a/tools/upload
+++ b/tools/upload
@@ -1,3 +1,3 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 exec go run tools/upload.go -region us-east-1 -bucket gobyexample.com