Release Lifecycle¶
What is a Release Lifecycle?¶
During each monthly release, Mattermost backports high severity or high impact security fixes to the previous three monthly releases. Extended Support Releases receive backports for security fixes and major bug fixes for the length of their life cycle. Once a release life cycle has ended, it will no longer receive the security or major bug backports. We follow the same release cycle pattern for all upcoming releases.
Important
Upgrade to server version v5.19 or later is required. Support for server Extended Support Release (ESR) 5.9 has ended and upgrading to server ESR v5.19 or later is required for improved security, performance, mobile app compatibility, and user experience. See this blog post for more details.
| Version | Release Type | Lifecyle Start Date | Lifecycle End Date | Extended Support Release |
|---|---|---|---|---|
| 5.27 | Quality | 2020-09-16 | 2020-12-15 | |
| 5.26 | Feature | 2020-08-16 | 2020-11-15 | |
| 5.25 | Quality | 2020-07-16 | 2021-04-15 | Yes |
| 5.24 | Feature | 2020-06-16 | 2020-09-15 | |
| 5.23 | Quality | 2020-05-16 | 2020-08-15 | |
| 5.22 | Feature | 2020-04-16 | 2020-07-15 | |
| 5.21 | Quality | 2020-03-16 | 2020-06-15 | |
| 5.20 | Feature | 2020-02-16 | 2020-05-15 | |
| 5.19 | Quality | 2020-01-16 | 2020-09-15 | Yes |
| 5.18 | Feature | 2019-12-16 | 2020-03-15 | |
| 5.17 | Quality | 2019-11-16 | 2020-02-15 | |
| 5.16 | Feature | 2019-10-16 | 2020-01-15 | |
| 5.15 | Quality | 2019-09-16 | 2019-12-15 | |
| 5.14 | Feature | 2019-08-16 | 2019-11-15 | |
| 5.13 | Quality | 2019-07-16 | 2019-09-15 | |
| 5.12 | Feature | 2019-06-16 | 2019-08-15 | |
| 5.11 | Quality | 2019-05-16 | 2019-07-15 | |
| 5.10 | Feature | 2019-04-16 | 2019-06-15 | |
| 5.9 | Quality | 2019-03-16 | 2020-04-15 | Yes |
| 5.8 | Feature | 2019-02-16 | 2019-04-15 | |
| 5.7 | Quality | 2019-01-16 | 2019-03-15 | |
| 5.6 | Feature | 2018-12-16 | 2019-02-15 | |
| 5.5 | Quality | 2018-11-16 | 2019-01-15 | |
| 5.4 | Feature | 2018-10-16 | 2018-12-15 | |
| 5.3 | Feature | 2018-09-16 | 2018-11-15 | |
| 5.2 | Feature | 2018-08-16 | 2018-10-15 | |
| 5.1 | Feature | 2018-07-16 | 2018-09-15 | |
| 5.0 | Feature | 2018-06-16 | 2018-08-15 | |
| 4.10 | Feature | 2018-05-16 | 2019-07-15 | Yes |
| 4.9 | Feature | 2018-04-16 | 2018-06-15 | |
| 4.8 | Feature | 2018-03-16 | 2018-05-15 | |
| 4.7 | Feature | 2018-02-16 | 2018-04-15 | |
| 4.6 | Feature | 2018-01-16 | 2018-03-15 | |
| 4.5 | Feature | 2017-12-16 | 2018-02-15 | |
| 4.4 | Feature | 2017-11-16 | 2018-01-15 | |
| 4.3 | Feature | 2017-10-16 | 2017-12-15 | |
| 4.2 | Feature | 2017-09-16 | 2017-11-15 | |
| 4.1 | Feature | 2017-08-16 | 2017-10-15 | |
| 4.0 | Feature | 2017-07-16 | 2017-09-15 |
