diff --git a/packages/plugin_platform_interface/CHANGELOG.md b/packages/plugin_platform_interface/CHANGELOG.md
index 055d6e0afa46..3ad68b19a606 100644
--- a/packages/plugin_platform_interface/CHANGELOG.md
+++ b/packages/plugin_platform_interface/CHANGELOG.md
@@ -1,3 +1,9 @@
+## 2.1.7
+
+* Changes `MockPlatformInterfaceMixin` to a `mixin class` for better
+  compatibility with projects that have a minumum Dart SDK version of 3.0.
+* Updates minimum supported SDK version to Dart 3.0.
+
 ## 2.1.6
 
 * Adds pub topics to package metadata.
diff --git a/packages/plugin_platform_interface/lib/plugin_platform_interface.dart b/packages/plugin_platform_interface/lib/plugin_platform_interface.dart
index 6733b29953b0..63408dd1e37e 100644
--- a/packages/plugin_platform_interface/lib/plugin_platform_interface.dart
+++ b/packages/plugin_platform_interface/lib/plugin_platform_interface.dart
@@ -126,4 +126,4 @@ abstract class PlatformInterface {
 ///    implements UrlLauncherPlatform {}
 /// ```
 @visibleForTesting
-abstract class MockPlatformInterfaceMixin implements PlatformInterface {}
+abstract mixin class MockPlatformInterfaceMixin implements PlatformInterface {}
diff --git a/packages/plugin_platform_interface/pubspec.yaml b/packages/plugin_platform_interface/pubspec.yaml
index b9bc3f824046..9c83848759ed 100644
--- a/packages/plugin_platform_interface/pubspec.yaml
+++ b/packages/plugin_platform_interface/pubspec.yaml
@@ -15,10 +15,10 @@ issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+
 # be done when absolutely necessary and after the ecosystem has already migrated to 2.X.Y version
 # that is forward compatible with 3.0.0 (ideally the ecosystem have migrated to depend on:
 # `plugin_platform_interface: >=2.X.Y <4.0.0`).
-version: 2.1.6
+version: 2.1.7
 
 environment:
-  sdk: ">=2.19.0 <4.0.0"
+  sdk: ">=3.0.0 <4.0.0"
 
 dependencies:
   meta: ^1.3.0