diff --git a/lxc-apt-upgrade b/lxc-apt-upgrade
index 53fa2a3..78840ab 100644
--- a/lxc-apt-upgrade
+++ b/lxc-apt-upgrade
@@ -1,4 +1,4 @@
-!/bin/bash
+#!/bin/bash
 #
 # Updates all running lxc containers on a proxmox host