diff --git a/docker/kolab/kolab-init.sh b/docker/kolab/kolab-init.sh
index b2bb9403..6310c61d 100755
--- a/docker/kolab/kolab-init.sh
+++ b/docker/kolab/kolab-init.sh
@@ -1,35 +1,36 @@
 #!/bin/bash
 
 if [ -d "/etc/dirsrv/slapd-kolab/" ]; then
     exit 0
 fi
 
 cp -av /bin/true /usr/sbin/ds_systemd_ask_password_acl
 
 pushd /root/utils/
 
 ./01-reverse-etc-hosts.sh && echo "01 done"
 ./02-write-my.cnf.sh && echo "02 done"
 ./03-setup-kolab.sh && echo "03 done"
 ./04-reset-mysql-kolab-password.sh && echo "04 done"
 ./05-replace-localhost.sh && echo "05 done"
 ./06-mysql-for-kolabdev.sh && echo "06 done"
 ./07-adjust-base-dns.sh && echo "07 done"
 ./08-disable-amavisd.sh && echo "08 done"
 ./09-enable-debugging.sh && echo "09 done"
 ./10-change-port-numbers.sh && echo "10 done"
 ./10-reset-kolab-service-password.sh && echo "10 done"
 ./11-reset-cyrus-admin-password.sh && echo "11 done"
 ./12-create-hosted-kolab-service.sh && echo "12 done"
 ./13-create-ou-domains.sh && echo "13 done"
 ./14-create-management-domain.sh && echo "14 done"
 ./15-create-hosted-domain.sh && echo "15 done"
 ./16-remove-cn-kolab-cn-config.sh && echo "16 done"
 ./17-remove-hosted-service-access-from-mgmt-domain.sh && echo "17 done"
 ./18-adjust-kolab-conf.sh && echo "18 done"
 ./19-turn-on-vlv-in-roundcube.sh && echo "19 done"
 ./20-add-alias-attribute-index.sh && echo "20 done"
 ./21-adjust-postfix-config.sh && echo "21 done"
 ./23-patch-system.sh && echo "23 done"
+./24-roundcubeconfig.sh && echo "24 done"
 
 touch /tmp/kolab-init.done
diff --git a/docker/kolab/utils/24-roundcubeconfig.sh b/docker/kolab/utils/24-roundcubeconfig.sh
new file mode 100755
index 00000000..6c7cf33d
--- /dev/null
+++ b/docker/kolab/utils/24-roundcubeconfig.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+
+sed -i -r -e "s/\$config['kolab_files_url'] =.*$/\$config['kolab_files_url'] = 'https://' \. \$_SERVER['HTTP_HOST'] . '/chwala/';/g" /etc/roundcubemail/kolab_files.inc.php
+
+sed -i -r -e "s/\$config['kolab_invitation_calendars'] =.*$/\$config['kolab_invitation_calendars'] = true;/g" /etc/roundcubemail/calendar.inc.php