Mastodon 4.0 End of Life
Support dates and upgrade guidance — rebuilt from live data.
End of Life
Mastodon 4.0 reached end of life on 31 Oct 2023. It no longer receives security fixes.
1,013 days without security patches
Recommended action: upgrade to Mastodon 4.6. Check your versiontootctl --version
Support timeline
Official dates from the Mastodon release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 14 Nov 2022 | — |
| End of life | 31 Oct 2023 | 2.8 years ago |
| Latest release | 4.0.15 · 16 Feb 2024 | final |
Where to go from 4.0
Recommended target: Mastodon 4.6.
The newest actively supported branch is Mastodon 4.6 (latest release 4.6.5).
Frequently asked questions
Is Mastodon 4.0 still safe to use?
Mastodon 4.0 reached end of life on 31 Oct 2023, 1,013 days ago, and is no longer covered by standard support. Running it means no guaranteed security fixes.
Can I still download Mastodon 4.0?
Yes — the final release (4.0.15) generally remains available from vendor archives and OS package mirrors, but installing it means running software with known, unpatched vulnerabilities.
What should I upgrade Mastodon 4.0 to?
Upgrade to Mastodon 4.6, the newest actively supported branch.