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Important Upgrade Notes#
Important
Support for Mattermost Server v9.11 Extended Support Release has come to the end of its life cycle on May 15, 2025. Upgrading to Mattermost Server v10.5 or later is required.
Note
Upgrading the Microsoft Teams Calling plugin to v2.0.0 requires users to reconnect their accounts.
Mattermost plugins built with Go versions 1.22.0 and 1.22.1 do not work. Plugin developers should use Go 1.22.2 or newer instead.
Keybase has stopped serving our Ubuntu repository signing key. If you were using it, update your installation scripts to retrieve the key as mentioned in our docs: https://docs.mattermost.com/deploy/server/deploy-linux.
MySQL 8.0.22 contains an issue with JSON column types changing string values to integers which is preventing Mattermost from working properly. Users are advised to avoid this database version.
When upgrading to 7.x from a 5.x release please make sure to upgrade to 5.37.10 first for the upgrade to complete successfully.