I received an email telling me that I need to update your ACME client
My web server is (include version): HP
The operating system my web server runs on is (include version): Ubuntu 16.04
PHP Version 7.0.32-0ubuntu0.16.04.1
ACME client: certbot
What do I have to do to change the validation method to HTTP-01, DNS-01 or TLS-ALPN-0?