---
title: Migrating to v15
description: Understand the Android Kotlin guidance that accompanied the v15 release.
---
> ## Documentation Index
> Fetch the complete documentation index at: https://react-native-google-mobile-ads.dev/llms.txt
> Use this file to discover all available pages before exploring further.

## Important Notice (Android Only)

Read this if an older v15 note told you to set Kotlin 2.0.0. That matched the Android tools at the time. It is not the minimum for later releases.

For v17, use Kotlin 1.9.25 or newer. Google Mobile Ads Android SDK 25.4 ships Kotlin 2.3
metadata, so v17 applies a module-scoped metadata compatibility compiler flag when built
with Kotlin versions earlier than 2.3. Kotlin 2.3 and newer need no skip. See
[Android Kotlin compatibility](/prerequisites#android-kotlin-compatibility) for details.