Erlang 21 End of Life
Support dates and upgrade guidance — rebuilt from live data.
Erlang 21 reached end of life on 19 Jun 2021. It no longer receives security fixes.
Support timeline
Official dates from the Erlang release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 19 Jun 2018 | — |
| End of life | 19 Jun 2021 | 5.1 years ago |
| Active support ended | 10 May 2019 | security fixes only after this |
| Latest release | 21.3.8.24 · 31 May 2021 | final |
Where to go from 21
Recommended target: Erlang 29 (supported until 11 May 2029).
The newest actively supported branch is Erlang 29 (latest release 29.0.5).
Frequently asked questions
Is Erlang 21 still safe to use?
Erlang 21 reached end of life on 19 Jun 2021, 1,877 days ago, and is no longer covered by standard support. Running it means no guaranteed security fixes.
Can I still download Erlang 21?
Yes — the final release (21.3.8.24) generally remains available from vendor archives and OS package mirrors, but installing it means running software with known, unpatched vulnerabilities.
What should I upgrade Erlang 21 to?
Upgrade to Erlang 29, the newest actively supported branch (supported until 11 May 2029).