diff --git a/update b/update
index d3347ab..183d25c 100755
--- a/update
+++ b/update
@@ -1,4 +1,9 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
+set -e
+
+BASEDIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+cd "${BASEDIR}"
 git submodule update --recursive --remote