Kotlin 1.9
This version has reached end of life and no longer receives updates.
July 6, 2023
Ongoing
May 21, 2024
1.9.25 (July 19, 2024)
About Kotlin 1.9
Kotlin 1.9 reached end of life on May 21, 2024, roughly 1 year ago. Since then, no security patches have been issued. If you are still running Kotlin 1.9, you should treat upgrading as a high-priority item. Any CVEs discovered against this version will not be fixed upstream.
Upgrade to Kotlin 2.3 for continued security coverage and access to the latest features. The upgrade from 1.9 to 2.3 is typically straightforward, but review the release notes for any deprecations or API changes.
Lifecycle Progress
This version reached end of life May 21, 2024.
All Kotlin Versions
| Version | Released | EOL | Latest | Status |
|---|---|---|---|---|
| 2.3 | December 16, 2025 | TBD | 2.3.10 | Active |
| 2.2 | June 23, 2025 | December 16, 2025 | 2.2.21 | End of Life |
| 2.1 | November 27, 2024 | June 23, 2025 | 2.1.21 | End of Life |
| 2.0 | May 21, 2024 | November 27, 2024 | 2.0.21 | End of Life |
| 1.9 (current page) | July 6, 2023 | May 21, 2024 | 1.9.25 | End of Life |
| 1.8 | December 28, 2022 | July 6, 2023 | 1.8.22 | End of Life |
| 1.7 | June 9, 2022 | December 28, 2022 | 1.7.22 | End of Life |
| 1.6 | November 15, 2021 | June 9, 2022 | 1.6.21 | End of Life |
| 1.5 | April 26, 2021 | November 29, 2021 | 1.5.32 | End of Life |
| 1.4 | August 14, 2020 | April 26, 2021 | 1.4.32 | End of Life |
| 1.3 | October 29, 2018 | August 14, 2020 | 1.3.72 | End of Life |
Frequently Asked Questions
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