diff --git a/bundles/systemd-timers/files/check_systemd_timer b/bundles/systemd-timers/files/check_systemd_timer
index 7aa53d8..c037641 100644
--- a/bundles/systemd-timers/files/check_systemd_timer
+++ b/bundles/systemd-timers/files/check_systemd_timer
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 if [[ -z "$1" ]]
 then