diff --git a/res/css/rethemendex.sh b/res/css/rethemendex.sh
index 13be73f9a9..e6fb4b8007 100755
--- a/res/css/rethemendex.sh
+++ b/res/css/rethemendex.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env sh
 
 cd `dirname $0`