diff --git a/app/build.gradle b/app/build.gradle
index 9c6e3ab..b1384b6 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -1,12 +1,11 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 28
-    buildToolsVersion '28.0.3'
+    compileSdkVersion 33
     defaultConfig {
         applicationId "jp.shts.android.storyprogressbar"
         minSdkVersion 15
-        targetSdkVersion 28
+        targetSdkVersion 33
         versionCode 1
         versionName "1.0"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
@@ -17,14 +16,22 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
     }
+
+    compileOptions {
+        sourceCompatibility 1.8
+        targetCompatibility 1.8
+    }
+
+    packagingOptions {
+        exclude 'META-INF/com.android.tools/proguard/coroutines.pro'
+    }
 }
 
 dependencies {
     implementation project(':library')
-    implementation 'androidx.appcompat:appcompat:1.1.0'
-    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
-    testImplementation 'junit:junit:4.12'
-    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
+    implementation 'androidx.appcompat:appcompat:1.5.1'
+    implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.4'
     androidTestImplementation('androidx.test.espresso:espresso-core:3.1.0', {
         exclude group: 'com.android.support', module: 'support-annotations'
     })
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 9505e53..010af4e 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -11,7 +11,7 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
-        <activity android:name=".MainActivity">
+        <activity android:name=".MainActivity" android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 
diff --git a/build.gradle b/build.gradle
index 68e19b3..0e6476a 100644
--- a/build.gradle
+++ b/build.gradle
@@ -2,13 +2,11 @@
 
 buildscript {
     repositories {
-        jcenter()
-        mavenCentral()
         google()
+        mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.5.1'
-        classpath 'com.github.dcendents:android-maven-gradle-plugin:2.1'
+        classpath 'com.android.tools.build:gradle:3.5.4'
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
     }
@@ -16,8 +14,8 @@ buildscript {
 
 allprojects {
     repositories {
-        jcenter()
         google()
+        mavenCentral()
     }
 }
 
diff --git a/library/build.gradle b/library/build.gradle
index 5c2dd28..fce5b55 100644
--- a/library/build.gradle
+++ b/library/build.gradle
@@ -1,12 +1,12 @@
 apply plugin: 'com.android.library'
 
 android {
-    compileSdkVersion 28
+    compileSdkVersion 33
     buildToolsVersion '28.0.3'
 
     defaultConfig {
         minSdkVersion 15
-        targetSdkVersion 28
+        targetSdkVersion 33
         versionCode 1
         versionName "1.0"
 
@@ -22,9 +22,8 @@ android {
 }
 
 dependencies {
-    implementation 'androidx.appcompat:appcompat:1.1.0'
-    testImplementation 'junit:junit:4.12'
-    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
+    implementation 'androidx.appcompat:appcompat:1.5.1'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.4'
     androidTestImplementation('androidx.test.espresso:espresso-core:3.1.0', {
         exclude group: 'com.android.support', module: 'support-annotations'
     })