diff --git a/login-log.py b/login-log.py
index 3daed45..7bdb952 100644
--- a/login-log.py
+++ b/login-log.py
@@ -1,3 +1,5 @@
+#!/usr/bin/env python3
+
 import os
 import socket
 from datetime import date
diff --git a/logoff-log.py b/logoff-log.py
index ddb2000..61b215a 100644
--- a/logoff-log.py
+++ b/logoff-log.py
@@ -1,3 +1,5 @@
+#!/usr/bin/env python3
+
 import os
 import socket
 from datetime import date
diff --git a/sendmail.py b/sendmail.py
index 5678ef6..833e753 100644
--- a/sendmail.py
+++ b/sendmail.py
@@ -1,3 +1,5 @@
+#!/usr/bin/env python3
+
 import smtplib
 import ssl