# Version Upgrade **URL:** \ **Category:** Help\ **Created:** [January 26, 2019, 1:22pm UTC](https://community.letsencrypt.org/t/version-upgrade/84104 "2019-01-26T13:22:02Z")\ **Posts on this page:** 1\ **Showing post:** 9
**Author:** ![glennbtn](https://avatars.discourse-cdn.com/v4/letter/g/a88e4f/32.png) [@glennbtn](https://community.letsencrypt.org/u/glennbtn)\ **Post date:** [January 27, 2019, 8:51am UTC](https://community.letsencrypt.org/t/version-upgrade/84104/9 "2019-01-27T08:51:27Z")
Thanks Guys for you help here running “ `apt-get update` ” and then “ `apt-cache policy certbot` ” again I get root@helpdesk:~# apt-cache policy certbot certbot: Installed: 0.26.1-1+ubuntu14.04.1+certbot+2 Candidate: 0.28.0-1+ubuntu14.04.1+certbot+4 Version table: 0.28.0-1+ubuntu14.04.1+certbot+4 0 500 [http://ppa.launchpad.net/certbot/certbot/ubuntu/](http://ppa.launchpad.net/certbot/certbot/ubuntu/) trusty/main amd64 Packages \*\*\* 0.26.1-1+ubuntu14.04.1+certbot+2 0 100 /var/lib/dpkg/status I a, a tad confused as the email gives a link [How to stop using TLS-SNI-01 with Certbot](https://community.letsencrypt.org/t/how-to-stop-using-tls-sni-01-with-certbot/83210) which say you need to be on 0.28 or higher. To be this running on 0.26.1 to I just need to run the command from the linked page sudo sh -c “sed -i.bak -e ‘s/^(pref\_challs._)tls-sni-01(._)/\1http-01\2/g’ /etc/letsencrypt/renewal/_; rm -f /etc/letsencrypt/renewal/_.bak” Running the dry run does seem to suggest it would completed as it does seem to suggest it’s using http http-01 challenge for [helpdesk.pdjitsupport.co.uk](http://helpdesk.pdjitsupport.co.uk) Waiting for verification… Cleaning up challenges Would be nice to know though why it will not upgrade to 0.28 Many thanks again Glenn --- _[View the full topic](https://community.letsencrypt.org/t/version-upgrade/84104)._