Bootstrap 3 End of Life
Support dates and upgrade guidance — rebuilt from live data.
End of Life
Bootstrap 3 reached end of life on 24 Jul 2019. It no longer receives security fixes.
2,573 days without security patches
Recommended action: upgrade to Bootstrap 5. Support timeline
Official dates from the Bootstrap release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 19 Aug 2013 | — |
| End of life | 24 Jul 2019 | 7.0 years ago |
| Active support ended | 5 Sept 2016 | security fixes only after this |
| Latest release | 3.4.1 · 13 Feb 2019 | final |
Where to go from 3
Recommended target: Bootstrap 5.
The newest actively supported branch is Bootstrap 5 (latest release 5.3.8).
Frequently asked questions
Is Bootstrap 3 still safe to use?
Bootstrap 3 reached end of life on 24 Jul 2019, 2,573 days ago, and is no longer covered by standard support. Running it means no guaranteed security fixes.
Can I still download Bootstrap 3?
Yes — the final release (3.4.1) generally remains available from vendor archives and OS package mirrors, but installing it means running software with known, unpatched vulnerabilities.
What should I upgrade Bootstrap 3 to?
Upgrade to Bootstrap 5, the newest actively supported branch.