diff --git a/java/google/registry/xjc/make_pkginfo.sh b/java/google/registry/xjc/make_pkginfo.sh
index 6bcad649b..d5748ca60 100755
--- a/java/google/registry/xjc/make_pkginfo.sh
+++ b/java/google/registry/xjc/make_pkginfo.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 # Copyright 2016 The Domain Registry Authors. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");