diff --git a/enable_autologin b/enable_autologin
index 3f928a1..36ed2e9 100755
--- a/enable_autologin
+++ b/enable_autologin
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/bash -e
 
 function usage() {
 	echo "$0 <username> <password>"
diff --git a/kcpassword b/kcpassword
index 37fc6bd..251796f 100755
--- a/kcpassword
+++ b/kcpassword
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # Port of Gavin Brock's Perl kcpassword generator to Python, by Tom Taylor
 # <tom@tomtaylor.co.uk>.