On Mon, Nov 21, 2016 at 05:40:22PM -0800, Peter Eckersley wrote: > The ACME protocol that it uses to talk to Let's > Encrypt is also rapidly evolving through an IETF working group > (https://datatracker.ietf.org/wg/acme/charter/), and the Let's Encrypt > server-side codebase (https://github.com/letsencrypt/boulder) is > currently working with an ACME backwards compatibilty window of 6-12 months, > but probably not longer than that.
This issue affects many more clients in Debian besides certbot: https://wiki.debian.org/LetsEncrypt Peter
