How to update Kotlin in Android Studio: complete guide

Development of modern applications for the platform Android is impossible without the use of up-to-date tools, and Kotlin occupies a central place here. Regularly updating your programming language and related plugins in your development environment is critical to gaining access to new features, improving compilation performance, and ensuring code security. Ignoring updates can lead to library incompatibility and difficulties when publishing a project in Android Studio critical for gaining access to new features, improving compilation performance, and ensuring code security. Ignoring updates can lead to library incompatibility and difficulties when publishing a project in Google Play.

The update process can seem confusing for beginners, since the versions of the compiler itself, the plugin IDE and dependencies in the project must be synchronized. Version mismatches often cause build errors that are difficult to diagnose without understanding the architecture of the build system Gradle. In this article, we will analyze in detail all the ways to update components, from automatic notifications to manual editing of configuration files.

Before proceeding with technical manipulations, you need to make sure that your version Android Studio itself is sufficiently recent. Old versions IDE may not support the latest stable releases of the plugin Kotlin. It is recommended to always check the updates section of the studio itself before modifying the programming language settings within the project.

Checking the current version and updating the plugin

The first step in the toolkit modernization process is to diagnose the current state of the development environment. The plugin can be updated independently of the language itself, although in recent versions they are often bundled. To check, you need to go to the menu Kotlin V Android Studio can be updated independently of the language itself, although in recent versions they are often bundled. To check you need to go to the menu File → Settings (or Android Studio → Preferences on macOS) and select the section Plugins.

In the list of installed plugins, find Kotlin. If there is a button next to the name Update, this means that a new version is available that is compatible with your IDE. Installing an update through the plugin manager interface is the safest and preferred method for most developers, as it guarantees the integrity of the configuration files.

⚠️ Attention: After updating a plugin through the manager, a full reboot is often required Android Studio. Simply switching between projects may not be enough to apply changes to the compiler core.

If the update button is missing, but you know that a new version has been released, your version Android Studio may be outdated. In this case, you should update it IDE through the menu Help → Check for Updates. New versions Kotlin often require a minimum version IDE for the parser and debugger to work correctly.

Setting the version in the Gradle file

The main place where the language version for a specific project is controlled is the file assembly build.gradle (or build.gradle.kts). This is where you specify which version the compiler should use to translate the source code. There are two main places to indicate the version: in the block plugins and in the section buildscript.

In modern projects using Gradle versions are often specified in a file settings.gradle or in a directory gradle via libs.versions.toml, if enabled Version Catalog. This allows you to manage dependencies centrally. If you are using the classic approach, find the line starting with org.jetbrains.kotlinand change the version number to the current one.

plugins {
id'com.android.application'
id'org.jetbrains.kotlin.android' version'1.9.20'
}

It is important to keep the plugin versions synchronized Android and Kotlin. Some versions of the plugin Android Gradle Plugin (AGP) require a minimum version of the compiler Kotlin. If after changing the version number the build crashes with a compatibility error, check the documentation release notes for your version AGP.

After making changes to the assembly file, you must click the button Sync Now, which will appear at the top of the editor. Android Studio will download new artifacts from the repository and apply the configuration. At this point, new libraries may be created, so a stable Internet connection is required.

Using Version Catalog for dependency management

A modern approach to version management in an ecosystem Android involves the use of Version Catalogs. This mechanism allows you to put all versions of libraries and plugins into a single file libs.versions.tomllocated in the folder gradle. This simplifies updating Kotlin in all project modules at once.

To configure, open the file toml and find the section [versions]. Here you can set a variable, for example, kotlin ="1.9.20". Then in the section [plugins] use a link to this variable: kotlin-android = { id ="org.jetbrains.kotlin.android", version.ref ="kotlin" }. This approach minimizes the risk of human error when manually entering numbers.

Parameter	Old value	New value	Where to change
Compiler	1.8.0	1.9.20	libs.versions.toml
KSP plugin	1.8.0-1.0.9	1.9.20-1.0.14	libs.versions.toml
Coroutines	1.6.0	1.7.0	build.gradle
JVM Target	11	17	build.gradle

The advantage of the version directory is that when updating Kotlin you do not need to search for all occurrences of the version in the code. It is enough to change one line in the tomlfile, and Gradle the new version will be applied to all modules where this dependency is used. This is especially useful in large projects with dozens of modules.

What to do if the version directory does not work?

Make sure that the experimental flag is enabled in settings.gradle or you are using a current version of Gradle (8.0+) that supports default directories.

Manual installation of the plugin and compiler

In some corporate environments or when working with specific EAP (Early Access app) assemblies, manual installation of the plugin may be required. You can download the plugin archive Kotlin from the official repository JetBrains and install it through the menu Settings → Plugins → ⚙️ → Install Plugin from Disk.

This method is useful when automatic updating is blocked by a proxy server or network restrictions. After selecting the plugin file, the system will prompt you to reload. Make sure that the version of the downloaded plugin is compatible with your version .zip plugin, the system will prompt you to reboot Android Studio. Make sure the version of the downloaded plugin is compatible with your version IDEotherwise the development environment may not start.

⚠️ Attention: When installing the plugin manually, the compiler version in build.gradle must match the plugin version or be lower. Using plugin version 1.8 with a 1.9 compiler in a project may result in unpredictable parsing errors.

It is also possible to install Kotlin via Command Line, if you prefer terminal utilities. However, for Androiddevelopment this method is rarely used, since Android Studio prefers to manage dependencies through Gradle. Local installation of the compiler via SDKMAN or Homebrew will not affect the project unless the build.gradle path to the external compiler is explicitly specified.

Setting up JVM Target and compatibility

Updating language Kotlin often requires changing the target version JVM. New versions of the compiler may no longer support older bytecode versions by default. For example, switching to Kotlin 1.9+ strongly recommends using JVM Target 17 or higher to use all optimizations.

You can change the settings in the kotlin inside build.gradleblock. You must explicitly specify the target platform version to avoid incompatibility warnings. This ensures that the compiled code will run correctly on devices with the appropriate version Android Runtime (ART).

android {
compileOptions {
sourceCompatibility JavaVersion.VERSION_17
targetCompatibility JavaVersion.VERSION_17
}
kotlinOptions {
jvmTarget ='17'
}
}

Don't forget that a change jvmTarget may require an update. If after changing the target version Android Gradle Plugin. If after changing the target version JVM the project stops building, check the plugin version requirements AGP in the documentation. Often, new language features are only available when using the latest build tools.

Fixing errors after an update

After an update Kotlin developers often encounter build errors related to library incompatibility. The most common problem is Module was compiled with an incompatible version of Kotlin. This means that one of the dependencies is built on a newer version of the language than is used in your project.

To solve the problem, you need to update all dependencies associated with Kotlinincluding coroutines, ktx and other libraries JetBrains. Often it is enough to bring the versions of all Kotlindependencies to a single denominator corresponding to the plugin version in plugins block.

• 🔄 Clear the cache Gradle via the menu File → Invalidate Caches / Restartif errors are preserved after editing versions.
• 📦 Check transitive dependencies using the command ./gradlew app:dependenciesto find conflicting libraries.
• 🛠 Update the plugin KSP or kaptas they are tightly bound to compiler versions Kotlin.

Another common problem is the appearance of new compiler warnings. Kotlin strictly monitors outdated APIs. Do not ignore warnings Deprecatedas in future versions they may become compilation errors, which will block the build of the project.

FAQ: Frequently asked questions

Do I need to remove the old version of Kotlin before installing the new one?

No, you do not need to manually delete files. Gradle will automatically download the new version to the local cache. Old versions will remain in the cache in case other projects require them. To clear the cache, use the built-in function Invalidate Caches.

Is it possible to use different versions of Kotlin in different modules of the same project?

Technically this is possible, but it is highly not recommended. This will lead to runtime version conflicts and errors MethodNotFoundException. All modules in one project must use the same version of the plugin and compiler Kotlin.

What to do if Android Studio no longer sees Kotlin syntax after updating?

Try File → Invalidate Caches / Restart. If this does not help, check that the plugin Kotlin is active in the settings. As a last resort, delete the folder .idea in the project root and re-import the project.

Does the Kotlin version affect the minimum version of Android (minSdk)?

There is no direct impact, but new language features (for example, timeouts v coroutines or new collection classes) may require newer versions of libraries, which in turn may increase minSdk. Always check release notes libraries.