diff --git a/Setup-docker-mailserver-using-the-script-setup.sh.md b/Setup-docker-mailserver-using-the-script-setup.sh.md
index c0ca67b..2c9f073 100644
--- a/Setup-docker-mailserver-using-the-script-setup.sh.md
+++ b/Setup-docker-mailserver-using-the-script-setup.sh.md
@@ -59,6 +59,7 @@ SUBCOMMANDS:
 * `./setup.sh config ssl`: generate ssl-certificates
 # debug 
 * `./setup.sh debug fetchmail`: see [wiki](https://github.com/tomav/docker-mailserver/wiki/Retrieve-emails-from-a-remote-mail-server-%28using-builtin-fetchmail%29#debugging)
+* `./setup.sh debug fail2ban <unban> <ip-address>`: omitt all options to get a list of banned IPs, otherwise unban the specified IP.
 * `./setup.sh debug show-mail-logs`: show the logfile contents of the mail container
 * `./setup.sh debug inspect`: show infos about the running container
 * `./setup.sh debug login <commands>`: run a <command> inside the mail container (omit the command to get shell access)