I am on Ubuntu 16.04 certbot version= 0.31.0 I got an email from Letsencrypt telling me to upgrade from ACMEv1 to ACMEv2. It sais According to our records, the software client you’re using to get Let’s Encrypt TLS/SSL certificates issued or renewed at least one HTTPS certificate in the past t…

Dry-run uses ACME-V02, renewal uses ACME-V01

9peppe March 10, 2020, 2:04pm 2

you can set it on the commandline with certbot renew --server and certbot should edit its conf accordingly.

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