diff --git a/How-to-install-or-upgrade-fail2ban-manually.md b/How-to-install-or-upgrade-fail2ban-manually.md
index 8498caf..caf8c00 100644
--- a/How-to-install-or-upgrade-fail2ban-manually.md
+++ b/How-to-install-or-upgrade-fail2ban-manually.md
@@ -69,7 +69,7 @@ for example:
   * for `python2`:<br/>
     `apt install python-pyinotify python-systemd`
   * for `python3`:<br/>
-    `apt install python3-pyinotify python3-systemd`
+    `apt install python3-pyinotify python3-systemd 2to3`
 - enter your (cloned) interim fail2ban directory:<br/>
 `cd /tmp/f2b`
 - if you want to use `python3` execute `./fail2ban-2to3` (and then use `python3` in command below)