diff --git a/buildtools/prepare_python.sh b/buildtools/prepare_python.sh
index 05b793d2..b3be736e 100755
--- a/buildtools/prepare_python.sh
+++ b/buildtools/prepare_python.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -e
 
diff --git a/buildtools/prepare_python2.sh b/buildtools/prepare_python2.sh
index 97e6f7a8..59e3acfd 100755
--- a/buildtools/prepare_python2.sh
+++ b/buildtools/prepare_python2.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -e
 
diff --git a/buildtools/prepare_python3.sh b/buildtools/prepare_python3.sh
index 8df3a3a9..a6a2c1c8 100755
--- a/buildtools/prepare_python3.sh
+++ b/buildtools/prepare_python3.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -e