# 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.

这些破坏性改动文档的准确性仅限于其发布时对应的版本。
随着时间的推移，文档中描述的方案可能会逐渐失效。
通常情况下，我们不会在每次发布新版本时都对这些文档进行同步更新。

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

[破坏性改动列表](/release/breaking-changes) 
列出了每个版本的文档。

:::


## 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-web.flutter-io.cn/packages/uni_links)
- [`package:app_links`](https://pub-web.flutter-io.cn/packages/app_links)
- [`package:flutter_branch_sdk`](https://pub-web.flutter-io.cn/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.cn/go/deep-link-flag-migration)

Relevant PR:

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