Kotlin releases

We ship different types of releases:

Feature releases (1.x) that bring major changes in the language.
Incremental releases (1.x.y) that are shipped between feature releases and include updates in the tooling, performance improvements, and bug fixes.
Bug fix releases (1.x.yz) that include bug fixes for incremental releases.

For example, for the feature release 1.3 we had several incremental releases including 1.3.10, 1.3.20, and 1.3.70. For 1.3.70, we had 2 bug fix releases – 1.3.71 and 1.3.72.

For each incremental and feature release, we also ship several preview (EAP) versions for you to try new features before they are released. See Early Access Preview for details.

Learn more about types of Kotlin releases and their compatibility.

Update to a new release

IntelliJ IDEA and Android Studio suggest updating to a new release once it is out. When you accept the suggestion, it automatically updates the Kotlin plugin to the new version. You can check the Kotlin version in Tools | Kotlin | Configure Kotlin Plugin Updates.

If you have projects created with earlier Kotlin versions, change the Kotlin version in your projects and update kotlinx libraries if necessary.

If you are migrating to the new feature release, Kotlin plugin's migration tools will help you with the migration.

IDE support

The IDE support for the latest version of the language is available for the following versions of IntelliJ IDEA and Android Studio:

IntelliJ IDEA:
- Latest stable
- Previous stable
- Early access versions
Android Studio:
- Latest released version
- Early access versions

Release details

The following table lists details of the latest Kotlin releases.

You can also use preview versions of Kotlin.

Build info	Build highlights
1.8.10 Released: February 2, 2023 Release on GitHub	A bug fix release for Kotlin 1.8.0. Learn more about Kotlin 1.8.0. For Android Studio Electric Eel and Flamingo, the Kotlin plugin 1.8.10 will be delivered with upcoming Android Studios updates.
1.8.0 Released: December 28, 2022 Release on GitHub	A feature release with improved kotlin-reflect performance, new recursively copy or delete directory content experimental functions for JVM, improved Objective-C/Swift interoperability. Learn more in: What's new in Kotlin 1.8.0 Compatibility guide for Kotlin 1.8.0
1.7.21 Released: November 9, 2022 Release on GitHub	A bug fix release for Kotlin 1.7.20. Learn more about Kotlin 1.7.20 in What's new in Kotlin 1.7.20. For Android Studio Dolphin, Electric Eel, and Flamingo, the Kotlin plugin 1.7.21 will be delivered with upcoming Android Studios updates.
1.7.20 Released: September 29, 2022 Release on GitHub	An incremental release with new language features, the support for several compiler plugins in the Kotlin K2 compiler, the new Kotlin/Native memory manager enabled by default, and the support for Gradle 7.1. Learn more in: What's new in Kotlin 1.7.20 What's new in Kotlin YouTube video Compatibility guide for Kotlin 1.7.20 Learn more about Kotlin 1.7.20.
1.7.10 Released: July 7, 2022 Release on GitHub	A bug fix release for Kotlin 1.7.0. Learn more about Kotlin 1.7.0. For Android Studio Dolphin (213) and Android Studio Electric Eel (221), the Kotlin plugin 1.7.10 will be delivered with upcoming Android Studios updates.
1.7.0 Released: June 9, 2022 Release on GitHub	A feature release with Kotlin K2 compiler in Alpha for JVM, stabilized language features, performance improvements, and evolutionary changes such as stabilizing experimental APIs. Learn more in: What's new in Kotlin 1.7.0 What's new in Kotlin YouTube video Compatibility guide for Kotlin 1.7.0
1.6.21 Released: April 20, 2022 Release on GitHub	A bug fix release for Kotlin 1.6.20. Learn more about Kotlin 1.6.20.
1.6.20 Released: April 4, 2022 Release on GitHub	An incremental release with various improvements such as: Prototype of context receivers Callable references to functional interface constructors Kotlin/Native: performance improvements for the new memory manager Multiplatform: hierarchical project structure by default Kotlin/JS: IR compiler improvements Gradle: compiler execution strategies Learn more about Kotlin 1.6.20.
1.6.10 Released: December 14, 2021 Release on GitHub	A bug fix release for Kotlin 1.6.0. Learn more about Kotlin 1.6.0.
1.6.0 Released: November 16, 2021 Release on GitHub	A feature release with new language features, performance improvements, and evolutionary changes such as stabilizing experimental APIs. Learn more in: Release blog post What's new in Kotlin 1.6.0 Compatibility guide
1.5.32 Released: November 29, 2021 Release on GitHub	A bug fix release for Kotlin 1.5.31. Learn more about Kotlin 1.5.30.
1.5.31 Released: September 20, 2021 Release on GitHub	A bug fix release for Kotlin 1.5.30. Learn more about Kotlin 1.5.30.
1.5.30 Released: August 23, 2021 Release on GitHub	An incremental release with various improvements such as: Instantiation of annotation classes on JVM Improved opt-in requirement mechanism and type inference Kotlin/JS IR backend in Beta Support for Apple Silicon targets Improved CocoaPods support Gradle: Java toolchain support and improved daemon configuration Learn more in: Release blog post What's new in Kotlin 1.5.30
1.5.21 Released: July 13, 2021 Release on GitHub	A bug fix release for Kotlin 1.5.20. Learn more about Kotlin 1.5.20.
1.5.20 Released: June 24, 2021 Release on GitHub	An incremental release with various improvements such as: String concatenation via `invokedynamic` on JVM by default Improved support for Lombok and support for JSpecify Kotlin/Native: KDoc export to Objective-C headers and faster `Array.copyInto()` inside one array Gradle: caching of annotation processors' classloaders and support for the `--parallel` Gradle property Aligned behavior of stdlib functions across platforms Learn more in: Release blog post What's new in Kotlin 1.5.20
1.5.10 Released: May 24, 2021 Release on GitHub	A bug fix release for Kotlin 1.5.0. Learn more about Kotlin 1.5.0.
1.5.0 Released: May 5, 2021 Release on GitHub	A feature release with new language features, performance improvements, and evolutionary changes such as stabilizing experimental APIs. Learn more in: Release blog post What's new in Kotlin 1.5.0 Compatibility guide
1.4.32 Released: March 22, 2021 Release on GitHub	A bug fix release for Kotlin 1.4.30. Learn more about Kotlin 1.4.30.
1.4.31 Released: February 25, 2021 Release on GitHub	A bug fix release for Kotlin 1.4.30 Learn more about Kotlin 1.4.30.
1.4.30 Released: February 3, 2021 Release on GitHub	An incremental release with various improvements such as: New JVM backend, now in Beta Preview of new language features Improved Kotlin/Native performance Standard library API improvements Learn more in: Release blog post What's new in Kotlin 1.4.30
1.4.21 Released: December 7, 2020 Release on GitHub	A bug fix release for Kotlin 1.4.20 Learn more about Kotlin 1.4.20.
1.4.20 Released: November 23, 2020 Release on GitHub	An incremental release with various improvements such as: Supporting new JVM features, like string concatenation via `invokedynamic` Improved performance and exception handling for Kotlin Multiplatform Mobile projects Extensions for JDK Path: `Path("dir") / "file.txt"` Learn more in: Release blog post What's new in Kotlin 1.4.20
1.4.10 Released: September 7, 2020 Release on GitHub	A bug fix release for Kotlin 1.4.0. Learn more about Kotlin 1.4.0.
1.4.0 Released: August 17, 2020 Release on GitHub	A feature release with many features and improvements that mostly focus on quality and performance. Learn more in: Release blog post What's new in Kotlin 1.4.0 Compatibility guide Migrating to Kotlin 1.4.0
1.3.72 Released: April 15, 2020 Release on GitHub	A bug fix release for Kotlin 1.3.70. Learn more about Kotlin 1.3.70.

Build info

Build highlights

1.8.10

Released: February 2, 2023