lacme (0.7-1) unstable; urgency=high The certificate indicated by 'CAfile' is no longer used as is in 'certificate-chain' (along with the leaf cert). The chain returned by the ACME v2 endpoint is used instead. This allows for more flexibility with respect to key/CA rotation. See for instance https://letsencrypt.org/2020/11/06/own-two-feet.html and https://community.letsencrypt.org/t/beginning-issuance-from-r3/139018 'CAfile' now defaults to /usr/share/lacme/ca-certificates.crt which is a concatenation of all known active CA certificates (which includes the previous default). Starting December 2020 Let's Encrypt will use a different chain of trust for certificate issuance, so users will a non-default 'CAfile' might need to adjust the value. -- Guilhem Moulin Thu, 26 Nov 2020 00:08:32 +0100