Tailwind CSS 1.1 End of Life
Support dates and upgrade guidance — rebuilt from live data.
End of Life
Tailwind CSS 1.1 reached end of life on 5 Feb 2020. It no longer receives security fixes.
2,377 days without security patches
Recommended action: upgrade to Tailwind CSS 4.3. Support timeline
Official dates from the Tailwind CSS release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 6 Aug 2019 | — |
| End of life | 5 Feb 2020 | 6.5 years ago |
| Latest release | 1.1.4 · 25 Nov 2019 | final |
Where to go from 1.1
Recommended target: Tailwind CSS 4.3.
The newest actively supported branch is Tailwind CSS 4.3 (latest release 4.3.3).
Frequently asked questions
Is Tailwind CSS 1.1 still safe to use?
Tailwind CSS 1.1 reached end of life on 5 Feb 2020, 2,377 days ago, and is no longer covered by standard support. Running it means no guaranteed security fixes.
Can I still download Tailwind CSS 1.1?
Yes — the final release (1.1.4) generally remains available from vendor archives and OS package mirrors, but installing it means running software with known, unpatched vulnerabilities.
What should I upgrade Tailwind CSS 1.1 to?
Upgrade to Tailwind CSS 4.3, the newest actively supported branch.