diff --git a/generate_descriptor_proto.sh b/generate_descriptor_proto.sh
index c170c837e0..668e6d135e 100755
--- a/generate_descriptor_proto.sh
+++ b/generate_descriptor_proto.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env bash
 
 # Run this script to regenerate descriptor.pb.{h,cc} after the protocol
 # compiler changes.  Since these files are compiled into the protocol compiler