diff --git a/contrib/mkimage-yum.sh b/contrib/mkimage-yum.sh
index 594eb96fec..54e99f1f04 100755
--- a/contrib/mkimage-yum.sh
+++ b/contrib/mkimage-yum.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # Create a base CentOS Docker image.
 #