diff --git a/MIDIDriver/build.gradle b/MIDIDriver/build.gradle
index c231fa2..2d3c531 100644
--- a/MIDIDriver/build.gradle
+++ b/MIDIDriver/build.gradle
@@ -12,7 +12,7 @@ repositories {
 
 dependencies {
     api 'jp.kshoji:javax-sound-midi:0.0.4:@aar'
-    api 'androidx.annotation:annotation:1.4.0'
+    api 'androidx.annotation:annotation:1.7.1'
     compileOnly project(':UnityPlayerMock')
     api fileTree(dir: 'libs', include: '*.jar')
 }
@@ -22,8 +22,11 @@ android {
 
     defaultConfig {
         minSdkVersion 12
+        targetSdkVersion 34
     }
 
+    namespace "jp.kshoji.driver.midi"
+
     sourceSets {
         main {
             manifest.srcFile 'AndroidManifest.xml'
diff --git a/MIDIDriverSample/AndroidManifest.xml b/MIDIDriverSample/AndroidManifest.xml
index 72dd53c..5c1b668 100644
--- a/MIDIDriverSample/AndroidManifest.xml
+++ b/MIDIDriverSample/AndroidManifest.xml
@@ -10,6 +10,7 @@
         android:icon="@drawable/ic_launcher"
         android:label="@string/app_name" >
         <activity
+            android:exported="true"
             android:name=".MIDIDriverSingleSampleActivity"
             android:label="@string/app_name_single"
             android:launchMode="singleTask" >
@@ -19,6 +20,7 @@
             </intent-filter>
         </activity>
         <activity
+            android:exported="true"
             android:name=".MIDIDriverMultipleSampleActivity"
             android:label="@string/app_name_multiple"
             android:launchMode="singleTask" >
@@ -28,6 +30,7 @@
             </intent-filter>
         </activity>
         <activity
+            android:exported="true"
             android:name=".UsbMidiDriverSampleActivity"
             android:label="@string/app_name_driver"
             android:launchMode="singleTask" >
diff --git a/MIDIDriverSample/build.gradle b/MIDIDriverSample/build.gradle
index 08a6baf..e220ab5 100644
--- a/MIDIDriverSample/build.gradle
+++ b/MIDIDriverSample/build.gradle
@@ -17,8 +17,11 @@ android {
 
     defaultConfig {
         minSdkVersion 12
+        targetSdkVersion 34
     }
 
+    namespace "jp.kshoji.driver.midi.sample"
+
     sourceSets {
         main {
             manifest.srcFile 'AndroidManifest.xml'
diff --git a/build.gradle b/build.gradle
index 4bf0701..109ff5e 100644
--- a/build.gradle
+++ b/build.gradle
@@ -5,7 +5,7 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:7.4.2'
+        classpath 'com.android.tools.build:gradle:8.3.0'
     }
 }
 
diff --git a/gradle.properties b/gradle.properties
index cfb8b04..a69b460 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,6 +1,5 @@
 android.useAndroidX=true
 android.enableJetifier=true
-android.disableAutomaticComponentCreation=true
 org.gradle.jvmargs=-Xmx4096m -XX:MaxMetaspaceSize=512m
 org.gradle.caching = true
 org.gradle.parallel = true
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 5bd139a..fac7e75 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Thu May 27 14:39:14 JST 2021
+#Mon Mar 11 05:36:39 GMT+09:00 2024
 distributionBase=GRADLE_USER_HOME
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.5-bin.zip
 distributionPath=wrapper/dists
-zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.4-bin.zip
 zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists