Let’s Encrypt will be making three previously-announced changes in one week, on May 13, 2026: The tlsserver ACME profile will switch to 45-day certificates. This profile is opt-in, for use by early adopters. The full timeline of shortening our certificates’ lifetime to 45 days over the next two years can be found in our blog post, Decreasing Certificate Lifetimes to 45 Days. The tlsclient ACME profile will only be available to ACME accounts which have previously requested a certificate from th...