[!WARNING] While we do our best to support Mastodon 4.3 until 2026-05-06, there are known security issues in some of the dependencies we use. We recommend administrators to update to a newer Mastodon version when they can.

Upgrade overview

This release contains upgrade notes that deviate from the norm:

ℹ️ Requires assets recompilation

For more information, view the complete release notes and scroll down to the upgrade instructions section.

Changelog

Security

• Insufficient verification of email addresses (GHSA-5r37-qpwq-2jhh)
• Updated dependencies

Added

• Add trademark warning to mastodon:setup task (#38548 by @ClearlyClaire)

Upgrade notes

To get the code for v4.3.22, use git fetch && git checkout v4.3.22.

[!NOTE] As always, make sure you have backups of the database before performing any upgrades. If you are using docker-compose, this is how a backup command might look: docker exec mastodon_db_1 pg_dump -Fc -U postgres postgres > name_of_the_backup.dump

Dependencies

External dependencies have not changed since v4.3.0, the compatible Ruby, PostgreSQL, Node, Elasticsearch and Redis versions are the same, that is:

• Ruby: 3.1 or newer
• PostgreSQL: 12 or newer. PostgreSQL versions 14.0 to 14.3 are not supported as they contain a critical data-corruption bug (see v4.3.0 release notes)
• Elasticsearch (recommended, for full-text search): 7.x (OpenSearch should also work)
• LibreTranslate (optional, for translations): 1.3.3 or newer
• Redis: 4 or newer
• Node: 18 or newer
• ImageMagick (optional if using libvips): 6.9.7-7 or newer
• libvips (optional, instead of ImageMagick): 8.13 or newer

Update steps

The following instructions are for updating from 4.3.21.

If you are upgrading directly from an earlier release, please carefully read the upgrade notes for the skipped releases as well, as they often require extra steps such as database migrations. In particular, please read the v4.3.0 release notes, as there have been multiple important changes.

Non-docker

[!TIP] The charlock_holmes gem may fail to build on some systems with recent versions of gcc. If you run into such an issue, try BUNDLE_BUILD__CHARLOCK_HOLMES="--with-cxxflags=-std=c++17" bundle install.

1. Install dependencies with bundle install and yarn install --immutable
2. Precompile the assets: RAILS_ENV=production bundle exec rails assets:precompile
3. Restart all Mastodon processes.

When using docker

1. Restart all Mastodon processes.