diff --git a/cron.sh b/cron.sh
index 0c67fe0..1ba1ee6 100755
--- a/cron.sh
+++ b/cron.sh
@@ -1,7 +1,7 @@
-#!/usr/bin/env bash
-DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
-pushd $DIR > /dev/null
+#!/bin/sh
+
+cd $(dirname $0)
 virtualenv env > /dev/null
-source env/bin/activate
-./fitsync.py
-popd > /dev/null
+. env/bin/activate
+./fitsync.py patch
+