diff --git a/install.sh b/install.sh
index 09c60bc..b34df0c 100644
--- a/install.sh
+++ b/install.sh
@@ -123,7 +123,12 @@ cp -a fail2ban/* /etc/fail2ban/
 echo "destemail = $WEBMASTER" >> /etc/fail2ban/jail.local
 echo "bantime = 24h" >> /etc/fail2ban/jail.d/defaults-debian.conf
 echo "maxretry = 3" >> /etc/fail2ban/jail.d/defaults-debian.conf
-echo "logpath = /var/log/auth.log tail" >> /etc/fail2ban/jail.d/defaults-debian.conf
+if [ $os_codename = jammy ]; then
+  echo "backend = auto" >> /etc/fail2ban/jail.d/defaults-debian.conf
+  echo "logpath = /var/log/auth.log tail" >> /etc/fail2ban/jail.d/defaults-debian.conf
+elif [ $os_codename = bookworm ]; then
+  echo "backend = systemd" >> /etc/fail2ban/jail.d/defaults-debian.conf
+fi
 systemctl enable fail2ban
 systemctl start fail2ban