diff --git a/filcnaplo/android/app/src/main/AndroidManifest.xml b/filcnaplo/android/app/src/main/AndroidManifest.xml
index 6e3adbd..38ae1d5 100644
--- a/filcnaplo/android/app/src/main/AndroidManifest.xml
+++ b/filcnaplo/android/app/src/main/AndroidManifest.xml
@@ -1,6 +1,6 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="hu.filc.naplo">
   <application android:label="Filc Napló" android:icon="@mipmap/ic_launcher" android:requestLegacyExternalStorage="true">
-    <activity android:name=".MainActivity" android:launchMode="singleTop" android:theme="@style/LaunchTheme" android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode" android:hardwareAccelerated="true" android:windowSoftInputMode="adjustResize">
+    <activity android:exported="true" android:name=".MainActivity" android:launchMode="singleTop" android:theme="@style/LaunchTheme" android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode" android:hardwareAccelerated="true" android:windowSoftInputMode="adjustResize">
       <meta-data android:name="io.flutter.embedding.android.NormalTheme" android:resource="@style/NormalTheme" />
       <intent-filter>
         <action android:name="android.intent.action.MAIN"/>
diff --git a/filcnaplo/android/build.gradle b/filcnaplo/android/build.gradle
index 403212e..edc4862 100644
--- a/filcnaplo/android/build.gradle
+++ b/filcnaplo/android/build.gradle
@@ -1,9 +1,9 @@
 buildscript {
-    ext.kotlin_version = '1.3.50'
+    ext.kotlin_version = '1.6.10'
 
     ext {
-        compileSdkVersion   = 30
-        targetSdkVersion    = 30
+        compileSdkVersion   = 31
+        targetSdkVersion    = 31
         appCompatVersion    = "1.1.0"
     }
 
@@ -33,8 +33,8 @@ subprojects {
     afterEvaluate {project ->
         if (project.plugins.hasPlugin('android') || project.plugins.hasPlugin('android-library')) {
             android {
-                compileSdkVersion 30
-                buildToolsVersion '30.0.3'
+                compileSdkVersion 31
+                buildToolsVersion '31.0.0'
             }
         }
     }
diff --git a/filcnaplo/lib/app.dart b/filcnaplo/lib/app.dart
index 77941cf..29db3b2 100644
--- a/filcnaplo/lib/app.dart
+++ b/filcnaplo/lib/app.dart
@@ -33,7 +33,7 @@ import 'package:filcnaplo_kreta_api/providers/timetable_provider.dart';
 import 'package:filcnaplo/api/providers/user_provider.dart';
 import 'package:filcnaplo/api/providers/update_provider.dart';
 import 'package:filcnaplo_mobile_ui/pages/grades/calculator/grade_calculator_provider.dart';
-import 'package:flutter_displaymode/flutter_displaymode.dart';
+// import 'package:flutter_displaymode/flutter_displaymode.dart';
 
 class App extends StatelessWidget {
   final SettingsProvider settings;
@@ -49,7 +49,7 @@ class App extends StatelessWidget {
     setSystemChrome(context);
 
     // Set high refresh mode #28
-    if (Platform.isAndroid) FlutterDisplayMode.setHighRefreshRate();
+    // if (Platform.isAndroid) FlutterDisplayMode.setHighRefreshRate();
 
     WidgetsBinding.instance?.addPostFrameCallback((_) {
       FilcAPI.getConfig(settings).then((Config? config) {
diff --git a/filcnaplo/pubspec.yaml b/filcnaplo/pubspec.yaml
index 25c8bfe..4eab82d 100644
--- a/filcnaplo/pubspec.yaml
+++ b/filcnaplo/pubspec.yaml
@@ -3,7 +3,7 @@ description: "Nem hivatalos e-napló alkalmazás az e-Kréta rendszerhez"
 homepage: https://filcnaplo.hu
 publish_to: "none"
 
-version: 3.1.1+139
+version: 3.2.0+140
 
 environment:
   sdk: ">=2.16.0-80.1.beta <3.0.0"
@@ -36,7 +36,7 @@ dependencies:
   share_plus: ^3.0.4
   package_info_plus: ^1.0.6
   connectivity_plus: ^2.0.2
-  flutter_displaymode: ^0.3.2
+  # flutter_displaymode: ^0.3.2
 
 dev_dependencies:
   flutter_test:
diff --git a/filcnaplo_kreta_api b/filcnaplo_kreta_api
index 6110105..1bc77b6 160000
--- a/filcnaplo_kreta_api
+++ b/filcnaplo_kreta_api
@@ -1 +1 @@
-Subproject commit 61101052badf399014e2abd26f675101f91117a8
+Subproject commit 1bc77b69dc5363c6818be0ee0a9291e40ef128c5
diff --git a/fix-d8dx.sh b/fix-d8dx.sh
new file mode 100644
index 0000000..ef172d1
--- /dev/null
+++ b/fix-d8dx.sh
@@ -0,0 +1,6 @@
+#!/bin/sh
+
+cd $ANDROID_SDK/build-tools/31.0.0 &&
+  mv -v d8 dx &&
+  cd lib &&
+  mv -v d8.jar dx.jar