diff --git a/Linux-201/Lab-Sheet.md b/Linux-201/Lab-Sheet.md
index c2de6bc..32d64cd 100644
--- a/Linux-201/Lab-Sheet.md
+++ b/Linux-201/Lab-Sheet.md
@@ -496,5 +496,6 @@ Be sure to join the [Freeside Discord](http://discord.freeside.co.uk/), where yo
  - [Nginx](https://www.nginx.com/)
  - [How to Secure a Linux Server](https://github.com/imthenachoman/How-To-Secure-A-Linux-Server/)
  - [SSL Certificates](https://letsencrypt.org)
+ - [How to secure Nginx with Let's Encrypt on Ubuntu Server 18.04](https://www.digitalocean.com/community/tutorials/how-to-secure-nginx-with-let-s-encrypt-on-ubuntu-18-04)
  - [Freeside Discord Invite](http://discord.freeside.co.uk/)
  - [Static Site Generators Comparison](https://www.staticgen.com/)