Certbot 0.26.0 Release


Certbot 0.26.0 has been released. The change log for the release is:

0.26.0 - 2018-07-11


  • A new security enhancement which we’re calling AutoHSTS has been added to Certbot’s Apache plugin. This enhancement configures your webserver to send a HTTP Strict Transport Security header with a low max-age value that is slowly increased over time. The max-age value is not increased to a large value until you’ve successfully managed to renew your certificate. This enhancement can be requested with the --auto-hsts flag.
  • New official DNS plugins have been created for Gehirn Infrastracture Service, Linode, OVH, and Sakura Cloud. These plugins can be found on our Docker Hub page at https://hub.docker.com/u/certbot and on PyPI.
  • The ability to reuse ACME accounts from Let’s Encrypt’s ACMEv1 endpoint on Let’s Encrypt’s ACMEv2 endpoint has been added.
  • Certbot and its components now support Python 3.7.
  • Certbot’s install subcommand now allows you to interactively choose which certificate to install from the list of certificates managed by Certbot.
  • Certbot now accepts the flag --no-autorenew which causes any obtained certificates to not be automatically renewed when it approaches expiration.
  • Support for parsing the TLS-ALPN-01 challenge has been added back to the acme library.


  • Certbot’s default ACME server has been changed to Let’s Encrypt’s ACMEv2 endpoint. By default, this server will now be used for both new certificate lineages and renewals.
  • The Nginx plugin is no longer marked labeled as an “Alpha” version.
  • The prepare method of Certbot’s plugins is no longer called before running “Updater” enhancements that are run on every invocation of certbot renew.

Despite us having broken lockstep, we are continuing to release new versions of all Certbot components during releases for the time being, however, the only packages with functional changes were:

  • acme
  • certbot
  • certbot-apache
  • certbot-dns-gehirn
  • certbot-dns-linode
  • certbot-dns-ovh
  • certbot-dns-sakuracloud
  • certbot-nginx

More details about these changes can be found on our GitHub repo:

Renewals rate limited on large server with 700+ domains

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