diff --git a/Linux_reinstall/Ubuntu/CloudInit/ipv6_static_interfaces.cfg b/Linux_reinstall/Ubuntu/CloudInit/ipv6_static_interfaces.cfg
index 0a30e7c..fa3f857 100644
--- a/Linux_reinstall/Ubuntu/CloudInit/ipv6_static_interfaces.cfg
+++ b/Linux_reinstall/Ubuntu/CloudInit/ipv6_static_interfaces.cfg
@@ -70,5 +70,6 @@ runcmd:
   - sed -ri 's/^backend = auto/backend = systemd/g' /etc/fail2ban/jail.conf
   - update-rc.d fail2ban enable
   - /etc/init.d/fail2ban restart
+  - grub-mkconfig -o /boot/grub/grub.cfg
   - rm -rf /etc/cloud/cloud.cfg.d/99-fake_cloud.cfg
   - touch /etc/cloud/cloud-init.disabled