diff --git a/gitlab-runner-installation.md b/gitlab-runner-installation.md
index ec17556..3a50c6c 100644
--- a/gitlab-runner-installation.md
+++ b/gitlab-runner-installation.md
@@ -39,6 +39,7 @@ Manual steps but it's going to be automated.
   `systemctl restart docker.service gitlab-runner.service`
 1. Install & configure Zabbix agent (give know to devops which has Ansible playbook for it)
 1. Add `vsyscall=emulate` kernel option, see https://gitlab.isc.org/isc-private/devops/issues/38
+1. Add `kernel.core_pattern=core` and `kernel.core_uses_pid=1` to `/etc/sysctl.conf` on Debian systems.
 1. Create a script to remove unused data every week:
 ```
 cat << EOF > /etc/cron.weekly/gitlab-runners-cleanup