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diff --git a/debian/lacme.NEWS b/debian/lacme.NEWS
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+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 <guilhem@debian.org>  Thu, 26 Nov 2020 00:08:32 +0100