diff --git a/debian/postinst b/debian/postinst
index 885d39aa..7ada14c8 100755
--- a/debian/postinst
+++ b/debian/postinst
@@ -80,6 +80,12 @@ EOF
     ;;
 esac
 
+if dpkg-maintscript-helper supports mv_conffile 2>/dev/null; then
+    dpkg-maintscript-helper mv_conffile /etc/fail2ban/filter.d/couriersmtp.conf /etc/fail2ban/filter.d/courier-smtp.conf 0.8.11-1 -- "$@"
+    dpkg-maintscript-helper mv_conffile /etc/fail2ban/filter.d/courierlogin.conf /etc/fail2ban/filter.d/courier-auth.conf 0.8.11-1 -- "$@"
+    dpkg-maintscript-helper mv_conffile /etc/fail2ban/action.d/firewall-cmd-direct-new.conf /etc/fail2ban/action.d/firewallcmd-new.conf 0.8.11-1 -- "$@"
+fi
+
 # dh_installdeb will replace this with shell code automatically
 # generated by other debhelper scripts.
 
diff --git a/debian/postrm b/debian/postrm
index 1e6c5ccd..4663d3c3 100755
--- a/debian/postrm
+++ b/debian/postrm
@@ -34,6 +34,12 @@ case "$1" in
         	;;
 esac
 
+if dpkg-maintscript-helper supports mv_conffile 2>/dev/null; then
+    dpkg-maintscript-helper mv_conffile /etc/fail2ban/filter.d/couriersmtp.conf /etc/fail2ban/filter.d/courier-smtp.conf 0.8.11-1 -- "$@"
+    dpkg-maintscript-helper mv_conffile /etc/fail2ban/filter.d/courierlogin.conf /etc/fail2ban/filter.d/courier-auth.conf 0.8.11-1 -- "$@"
+    dpkg-maintscript-helper mv_conffile /etc/fail2ban/action.d/firewall-cmd-direct-new.conf /etc/fail2ban/action.d/firewallcmd-new.conf 0.8.11-1 -- "$@"
+fi
+
 # dh_installdeb will replace this with shell code automatically
 # generated by other debhelper scripts.
 
diff --git a/debian/preinst b/debian/preinst
new file mode 100755
index 00000000..fb86a5d4
--- /dev/null
+++ b/debian/preinst
@@ -0,0 +1,13 @@
+#!/bin/sh
+
+set -e
+
+if dpkg-maintscript-helper supports mv_conffile 2>/dev/null; then
+    dpkg-maintscript-helper mv_conffile /etc/fail2ban/filter.d/couriersmtp.conf /etc/fail2ban/filter.d/courier-smtp.conf 0.8.11-1 -- "$@"
+    dpkg-maintscript-helper mv_conffile /etc/fail2ban/filter.d/courierlogin.conf /etc/fail2ban/filter.d/courier-auth.conf 0.8.11-1 -- "$@"
+    dpkg-maintscript-helper mv_conffile /etc/fail2ban/action.d/firewall-cmd-direct-new.conf /etc/fail2ban/action.d/firewallcmd-new.conf 0.8.11-1 -- "$@"
+fi
+
+#DEBHELPER#
+
+exit 0