diff --git a/app/build.gradle b/app/build.gradle
index 6673389..ae2c99a 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -1,13 +1,13 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 30 // 30 = Android 11
+    compileSdkVersion 31 // 31 = Android 12
     defaultConfig {
         applicationId "net.moasdawiki.app"
-        minSdkVersion 26 // 26 = Oreo 8.0
-        targetSdkVersion 30 // should be same as compileSdkVersion
-        versionCode 27
-        versionName "2.6.1.0"
+        minSdkVersion 28 // 28 = Android 9
+        targetSdkVersion 31 // should be same as compileSdkVersion
+        versionCode 28
+        versionName "3.1.0.0"
         archivesBaseName = "moasdawiki-" + versionName + "-" + versionCode
     }
     sourceSets {
@@ -18,8 +18,8 @@ android {
         }
     }
     compileOptions {
-        sourceCompatibility = 1.8
-        targetCompatibility = 1.8
+        sourceCompatibility JavaVersion.VERSION_11
+        targetCompatibility JavaVersion.VERSION_11
     }
 }
 
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index c700c4e..ff38073 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -20,7 +20,8 @@
 
         <activity
             android:name=".MainActivity"
-            android:label="@string/app_name">
+            android:label="@string/app_name"
+            android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />
@@ -44,7 +45,8 @@
 
         <service
             android:name="net.moasdawiki.app.CalendarAccountAuthenticatorService"
-            tools:ignore="ExportedService">
+            tools:ignore="ExportedService"
+            android:exported="true">
             <intent-filter>
                 <action android:name="android.accounts.AccountAuthenticator"/>
             </intent-filter>