diff --git a/android/build.gradle b/android/build.gradle
index bc99d82..5f90632 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -26,6 +26,9 @@ apply plugin: 'com.android.library'
 apply plugin: 'kotlin-android'
 
 android {
+    if (project.android.hasProperty('namespace')) {
+        namespace 'com.linecorp.flutter_line_sdk'
+    }
     compileSdk 33
 
     sourceSets {
@@ -39,6 +42,15 @@ android {
     lintOptions {
         disable 'InvalidPackage'
     }
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    kotlinOptions {
+        jvmTarget = '1.8'
+    }
 }
 
 dependencies {
@@ -47,7 +59,7 @@ dependencies {
         exclude group: 'androidx.lifecycle', module: 'lifecycle-extensions'
     }
     implementation 'com.google.code.gson:gson:2.8.5'
-    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
     implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:1.0.1"
     implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:1.0.1"
 }
diff --git a/example/android/app/build.gradle b/example/android/app/build.gradle
index b30c4a9..b92772f 100644
--- a/example/android/app/build.gradle
+++ b/example/android/app/build.gradle
@@ -1,3 +1,9 @@
+plugins {
+    id "com.android.application"
+    id "kotlin-android"
+    id "dev.flutter.flutter-gradle-plugin"
+}
+
 def localProperties = new Properties()
 def localPropertiesFile = rootProject.file('local.properties')
 if (localPropertiesFile.exists()) {
@@ -6,10 +12,6 @@ if (localPropertiesFile.exists()) {
     }
 }
 
-def flutterRoot = localProperties.getProperty('flutter.sdk')
-if (flutterRoot == null) {
-    throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
-}
 
 def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
 if (flutterVersionCode == null) {
@@ -21,11 +23,10 @@ if (flutterVersionName == null) {
     flutterVersionName = '1.0'
 }
 
-apply plugin: 'com.android.application'
-apply plugin: 'kotlin-android'
-apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
+
 
 android {
+    namespace 'com.linecorp.linesdk.sample'
     compileSdk 33
 
     sourceSets {
@@ -46,6 +47,15 @@ android {
         multiDexEnabled true
     }
 
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_17
+        targetCompatibility JavaVersion.VERSION_17
+    }
+
+    kotlinOptions {
+        jvmTarget = '17'
+    }
+
     buildTypes {
         debug {
             // for proguard verification
@@ -63,7 +73,6 @@ flutter {
 }
 
 dependencies {
-    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'androidx.test.ext:junit:1.1.1'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.0'
diff --git a/example/android/build.gradle b/example/android/build.gradle
index 6571f4e..c9e7d0a 100644
--- a/example/android/build.gradle
+++ b/example/android/build.gradle
@@ -1,12 +1,12 @@
 buildscript {
-    ext.kotlin_version = '1.7.21'
+    ext.kotlin_version = '2.0.0'
     repositories {
         google()
         mavenCentral()
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:7.3.1'
+        classpath 'com.android.tools.build:gradle:8.4.0'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
     }
 }
diff --git a/example/android/gradle.properties b/example/android/gradle.properties
index 38c8d45..b9a9a24 100644
--- a/example/android/gradle.properties
+++ b/example/android/gradle.properties
@@ -1,4 +1,6 @@
 org.gradle.jvmargs=-Xmx1536M
-android.enableR8=true
 android.useAndroidX=true
 android.enableJetifier=true
+android.defaults.buildfeatures.buildconfig=true
+android.nonTransitiveRClass=false
+android.nonFinalResIds=false
diff --git a/example/android/gradle/wrapper/gradle-wrapper.properties b/example/android/gradle/wrapper/gradle-wrapper.properties
index 2005b75..2a0fcc1 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-7.6-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.6-bin.zip
diff --git a/example/android/settings.gradle b/example/android/settings.gradle
index 5a2f14f..e554fd0 100644
--- a/example/android/settings.gradle
+++ b/example/android/settings.gradle
@@ -1,15 +1,25 @@
-include ':app'
+pluginManagement {
+    def flutterSdkPath = {
+        def properties = new Properties()
+        file("local.properties").withInputStream { properties.load(it) }
+        def flutterSdkPath = properties.getProperty("flutter.sdk")
+        assert flutterSdkPath != null, "flutter.sdk not set in local.properties"
+        return flutterSdkPath
+    }()
 
-def flutterProjectRoot = rootProject.projectDir.parentFile.toPath()
+    includeBuild("$flutterSdkPath/packages/flutter_tools/gradle")
 
-def plugins = new Properties()
-def pluginsFile = new File(flutterProjectRoot.toFile(), '.flutter-plugins')
-if (pluginsFile.exists()) {
-    pluginsFile.withReader('UTF-8') { reader -> plugins.load(reader) }
+    repositories {
+        google()
+        mavenCentral()
+        gradlePluginPortal()
+    }
 }
 
-plugins.each { name, path ->
-    def pluginDirectory = flutterProjectRoot.resolve(path).resolve('android').toFile()
-    include ":$name"
-    project(":$name").projectDir = pluginDirectory
+plugins {
+    id "dev.flutter.flutter-plugin-loader" version "1.0.0"
+    id "com.android.application" version "8.4.0" apply false
+    id "org.jetbrains.kotlin.android" version "2.0.0" apply false
 }
+
+include ":app"
\ No newline at end of file
diff --git a/example/pubspec.lock b/example/pubspec.lock
index 57338c4..b40145f 100644
--- a/example/pubspec.lock
+++ b/example/pubspec.lock
@@ -45,10 +45,10 @@ packages:
     dependency: "direct main"
     description:
       name: cupertino_icons
-      sha256: d57953e10f9f8327ce64a508a355f0b1ec902193f66288e8cb5070e7c47eeb2d
+      sha256: ba631d1c7f7bef6b729a622b7b752645a2d076dba9976925b8f25725a30e1ee6
       url: "https://pub.dev"
     source: hosted
-    version: "1.0.6"
+    version: "1.0.8"
   fake_async:
     dependency: transitive
     description:
diff --git a/example/pubspec.yaml b/example/pubspec.yaml
index 4294256..9fb6569 100644
--- a/example/pubspec.yaml
+++ b/example/pubspec.yaml
@@ -12,7 +12,7 @@ dependencies:
 
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.
-  cupertino_icons: ^1.0.5
+  cupertino_icons: ^1.0.8
 
 dev_dependencies:
   flutter_test: