diff --git a/README.md b/README.md
index 35f00d5..f169af7 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@ these commands:
     $ systemctl list-units
     $ systemctl status
 
-Requires python-dbus.
+Requires python3-dbus.
 
 License: Public Domain. Keep my name in it if you like.
-Author:  Mike Gerber 2015, 2016
+Author:  Mike Gerber 2015, 2016, 2021
diff --git a/check_systemd_state b/check_systemd_state
index b1c2a86..1a96c93 100755
--- a/check_systemd_state
+++ b/check_systemd_state
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/python3
 # Nagios plugin to check the system state according to systemd.
 
 from __future__ import division, print_function