# Deep links flag change

> If you use a third party deep linking plugin package for mobile apps, set Flutter's deep linking flag to false.




:::important
These breaking change docs are accurate, as of the release
under which they are published. Over time, the
workarounds described here might become inaccurate.
We don't, in general, keep these breaking change docs up
to date as of each release.

The [breaking change index file](/release/breaking-changes)
lists the docs created for each release.
:::


## Summary

**This breaking change only affects mobile apps that
use a third party deep linking plugin package.**

The default value for Flutter's deep linking option has changed from
`false` to `true`, meaning that deep linking is now opt-in by default.

## Migration guide

If you're using Flutter's default deep linking setup,
this isn't a breaking change for you.

However, if you're using a third-party plugin for deep links,
such as the following, this update introduces a breaking change:

- [Firebase dynamic links](https://firebase.google.com/docs/dynamic-links)
- [`package:uni_link`](https://pub.dev/packages/uni_links)
- [`package:app_links`](https://pub.dev/packages/app_links)
- [`package:flutter_branch_sdk`](https://pub.dev/packages/flutter_branch_sdk)

In this case, you must manually reset the
Flutter deep linking option to `false`.

Within your app's `AndroidManifest.xml` file for Android:

```xml title="AndroidManifest.xml" highlightLines=4
<manifest>
   <application
       <activity>
<meta-data android:name="flutter_deeplinking_enabled" android:value="false" />
       </activity>
   </application>
</manifest>
```

Within your app's `info.plist` file for iOS:

```xml title="info.plist"
 <key>FlutterDeepLinkingEnabled</key>
 <false/>
```

## Timeline

Landed in version: 3.25.0-0.1.pre<br>
Stable release: 3.27

## References

Design document:

- [flutter.dev/go/deep-link-flag-migration](https://flutter.dev/go/deep-link-flag-migration)

Relevant PR:

* [Set deep linking flag to true by default](https://github.com/flutter/engine/pull/52350)