Required Kotlin version
To build a Flutter app for Android, Kotlin 1.5.31 or greater is required.
If your app uses a lower version, you will receive the following error message:
┌─ Flutter Fix ────────────────────────────────────────────────────────────┐
│ │
│ [!] Your project requires a newer version of the Kotlin Gradle plugin. │
│ Find the latest version on │
│ https://kotlinlang.org/docs/gradle.html#plugin-and-versions, then update │
│ <path-to-app>/android/build.gradle: │
│ ext.kotlin_version = '<latest-version>' │
│ │
└──────────────────────────────────────────────────────────────────────────┘Flutter added support for foldable devices on Android. This required adding an AndroidX dependency to the Flutter embedding that requires apps to use Kotlin 1.5.31 or greater.
A Flutter app compiled for Android now includes the Gradle dependency androidx.window:window-java.
Open <app-src>/android/build.gradle, and change ext.kotlin_version:
groovy
buildscript {
ext.kotlin_version = '1.3.50'
ext.kotlin_version = '1.5.31'Landed in version: v2.9.0 beta
In stable release: 2.10
Relevant PR:
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Provide details Unless stated otherwise, the documentation on this site reflects the latest stable version of Flutter. Page last updated on 2025-04-25. View source or report an issue.