diff --git a/cleanup b/cleanup
index 88fef0f..c8e4231 100755
--- a/cleanup
+++ b/cleanup
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #This ensures a placeholder is shipped with CMD build.
 for file in src/cld_3/protos/*.proto; do
   echo "#error This is a placeholder file." > ${file%.proto}.pb.cc