diff --git a/CHANGELOG.md b/CHANGELOG.md
index 65a1602..cfa17d7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.3.0
+
+* Upgrade to AGP 8.1.0 (migrate namespace to build.gradle)
+
 ## 0.2.0
 
 * Finish flutter embedding v2 migration. #17
diff --git a/android/build.gradle b/android/build.gradle
index 4c7c7b9..dbb4cf0 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -4,25 +4,26 @@ version '1.0'
 buildscript {
     repositories {
         google()
-        jcenter()
+        mavenCentral()
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.2.1'
+        classpath 'com.android.tools.build:gradle:8.1.0'
     }
 }
 
 rootProject.allprojects {
     repositories {
         google()
-        jcenter()
+        mavenCentral()
     }
 }
 
 apply plugin: 'com.android.library'
 
 android {
-    compileSdkVersion 28
+    namespace "io.adaptant.labs.flutter_windowmanager"
+    compileSdk 31
 
     defaultConfig {
         minSdkVersion 16
diff --git a/android/src/main/AndroidManifest.xml b/android/src/main/AndroidManifest.xml
index 07f0c40..a2f47b6 100644
--- a/android/src/main/AndroidManifest.xml
+++ b/android/src/main/AndroidManifest.xml
@@ -1,3 +1,2 @@
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-  package="io.adaptant.labs.flutter_windowmanager">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
 </manifest>
diff --git a/example/android/app/build.gradle b/example/android/app/build.gradle
index bbc428e..71d7fb7 100644
--- a/example/android/app/build.gradle
+++ b/example/android/app/build.gradle
@@ -25,7 +25,8 @@ apply plugin: 'com.android.application'
 apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
 android {
-    compileSdkVersion 28
+    namespace "io.adaptant.labs.flutter_windowmanager_example"
+    compileSdk 31
 
     lintOptions {
         disable 'InvalidPackage'
@@ -35,7 +36,7 @@ android {
         // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
         applicationId "io.adaptant.labs.flutter_windowmanager_example"
         minSdkVersion 16
-        targetSdkVersion 28
+        targetSdk 31
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
diff --git a/example/android/app/src/main/AndroidManifest.xml b/example/android/app/src/main/AndroidManifest.xml
index ba3a1b8..fa14499 100644
--- a/example/android/app/src/main/AndroidManifest.xml
+++ b/example/android/app/src/main/AndroidManifest.xml
@@ -1,5 +1,4 @@
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="io.adaptant.labs.flutter_windowmanager_example">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
     <application
         android:label="flutter_windowmanager_example"
         android:icon="@mipmap/ic_launcher">
@@ -12,7 +11,8 @@
             android:theme="@style/LaunchTheme"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
             android:hardwareAccelerated="true"
-            android:windowSoftInputMode="adjustResize">
+            android:windowSoftInputMode="adjustResize"
+            android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN"/>
                 <category android:name="android.intent.category.LAUNCHER"/>
diff --git a/example/android/build.gradle b/example/android/build.gradle
index bb8a303..8ce0f1d 100644
--- a/example/android/build.gradle
+++ b/example/android/build.gradle
@@ -1,18 +1,18 @@
 buildscript {
     repositories {
         google()
-        jcenter()
+        mavenCentral()
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.2.1'
+        classpath 'com.android.tools.build:gradle:8.1.0'
     }
 }
 
 allprojects {
     repositories {
         google()
-        jcenter()
+        mavenCentral()
     }
 }
 
@@ -24,6 +24,6 @@ subprojects {
     project.evaluationDependsOn(':app')
 }
 
-task clean(type: Delete) {
+tasks.register("clean", Delete) {
     delete rootProject.buildDir
 }
diff --git a/example/android/gradle/wrapper/gradle-wrapper.properties b/example/android/gradle/wrapper/gradle-wrapper.properties
index 2819f02..89e56bd 100644
--- a/example/android/gradle/wrapper/gradle-wrapper.properties
+++ b/example/android/gradle/wrapper/gradle-wrapper.properties
@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.2-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.0-all.zip
diff --git a/example/pubspec.yaml b/example/pubspec.yaml
index 000cb1e..0d49ff8 100644
--- a/example/pubspec.yaml
+++ b/example/pubspec.yaml
@@ -3,7 +3,7 @@ description: Demonstrates how to use the flutter_windowmanager plugin.
 publish_to: 'none'
 
 environment:
-  sdk: ">=2.1.0 <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
 
 dependencies:
   flutter:
diff --git a/example/test/widget_test.dart b/example/test/widget_test.dart
index 7dbe875..70a41e7 100644
--- a/example/test/widget_test.dart
+++ b/example/test/widget_test.dart
@@ -19,7 +19,7 @@ void main() {
     expect(
       find.byWidgetPredicate(
         (Widget widget) =>
-            widget is Text && widget.data.startsWith('Secure Mode:'),
+            widget is Text && widget.data!.startsWith('Secure Mode:'),
       ),
       findsOneWidget,
     );
diff --git a/pubspec.yaml b/pubspec.yaml
index 9d9be72..532c0c8 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: flutter_windowmanager
 description: A Flutter plugin for manipulating Android WindowManager LayoutParams.
-version: 0.2.0
+version: 0.3.0
 homepage: https://github.com/adaptant-labs/flutter_windowmanager
 repository: https://github.com/adaptant-labs/flutter_windowmanager
 issue_tracker: https://github.com/adaptant-labs/flutter_windowmanager/issues