diff --git a/scripts/upgrade.sh b/scripts/upgrade.sh
index f974d68e0..af2ab4be4 100755
--- a/scripts/upgrade.sh
+++ b/scripts/upgrade.sh
@@ -1,4 +1,4 @@
-#!/usr/bin/env sh
+#!/bin/bash
 
 nodeMinVersion="v6.0.0"
 npmMinVersion="3.0.0"