Source: https://community.letsencrypt.org/t/how-to-stop-using-tls-sni-01-with-certbot/83210

Environment:

  • Ubuntu 16.04
  • Nginx

Step 1: Update Certbot to latest version

Confirm version is 0.28 or higher:

Step 2: Follow the guide
Remove any explicit references to tls-sni-01 in your renewal configuration

Do a full renewal dry run: