diff --git a/refilc/android/app/build.gradle b/refilc/android/app/build.gradle
index ed64cee..a1e4b0e 100644
--- a/refilc/android/app/build.gradle
+++ b/refilc/android/app/build.gradle
@@ -78,9 +78,9 @@ android {
         // targetCompatibility JavaVersion.VERSION_21
     }
 
-    // kotlinOptions {
-    //     jvmTarget = JavaVersion.VERSION_1_8
-    // }
+    kotlinOptions {
+        jvmTarget = JavaVersion.VERSION_1_8
+    }
 
     signingConfigs {
         debug {
diff --git a/refilc/android/gradle.properties b/refilc/android/gradle.properties
index 62db1c9..37fea0e 100644
--- a/refilc/android/gradle.properties
+++ b/refilc/android/gradle.properties
@@ -1,9 +1,4 @@
-org.gradle.jvmargs=-Xmx1536M \
---add-exports=java.base/sun.nio.ch=ALL-UNNAMED \
---add-opens=java.base/java.lang=ALL-UNNAMED \
---add-opens=java.base/java.lang.reflect=ALL-UNNAMED \
---add-opens=java.base/java.io=ALL-UNNAMED \
---add-exports=jdk.unsupported/sun.misc=ALL-UNNAMED
+org.gradle.jvmargs=-Xmx4G -XX:MaxMetaspaceSize=2G -XX:+HeapDumpOnOutOfMemoryError
 android.useAndroidX=true
 android.enableJetifier=true
-kotlin.jvm.target.validation.mode=IGNORE
\ No newline at end of file
+# kotlin.jvm.target.validation.mode=IGNORE
\ No newline at end of file
diff --git a/refilc/android/gradle/wrapper/gradle-wrapper.properties b/refilc/android/gradle/wrapper/gradle-wrapper.properties
index 43cd16a..e6b38c2 100644
--- a/refilc/android/gradle/wrapper/gradle-wrapper.properties
+++ b/refilc/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-8.5-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.3-all.zip
diff --git a/refilc/android/settings.gradle b/refilc/android/settings.gradle
index 55a313e..1bd8dc9 100644
--- a/refilc/android/settings.gradle
+++ b/refilc/android/settings.gradle
@@ -24,7 +24,7 @@ pluginManagement {
 
 plugins {
     id "dev.flutter.flutter-plugin-loader" version "1.0.0"
-    id "com.android.application" version "8.3.0" apply false
+    id "com.android.application" version "8.1.0" apply false
     id "org.jetbrains.kotlin.android" version "2.0.20" apply false
 }
 
diff --git a/refilc/lib/api/providers/database_provider.dart b/refilc/lib/api/providers/database_provider.dart
index e242c45..1971ac3 100644
--- a/refilc/lib/api/providers/database_provider.dart
+++ b/refilc/lib/api/providers/database_provider.dart
@@ -15,11 +15,7 @@ class DatabaseProvider {
   Future<void> init() async {
     Database db;
 
-    if (Platform.isLinux || Platform.isWindows) {
-      db = await databaseFactoryFfi.openDatabase("app.db");
-    } else {
-      db = await openDatabase("app.db");
-    }
+    db = await openDatabase("app.db");
 
     query = DatabaseQuery(db: db);
     store = DatabaseStore(db: db);
diff --git a/refilc/pubspec.yaml b/refilc/pubspec.yaml
index 6459e1b..45307f0 100644
--- a/refilc/pubspec.yaml
+++ b/refilc/pubspec.yaml
@@ -3,10 +3,10 @@ description: "Egy nem hivatalos e-KRÉTA kliens, diákoktól diákoknak."
 homepage: https://refilc.hu
 publish_to: "none"
 
-version: 5.1.0+280
+version: 5.1.0+281
 
 environment:
-  sdk: ">=3.3.2 <=3.6.0"
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/refilc_kreta_api/pubspec.yaml b/refilc_kreta_api/pubspec.yaml
index 40bd093..c0cf589 100644
--- a/refilc_kreta_api/pubspec.yaml
+++ b/refilc_kreta_api/pubspec.yaml
@@ -2,7 +2,7 @@ name: refilc_kreta_api
 publish_to: "none"
 
 environment:
-  sdk: ">=3.3.2 <=3.6.0"
+  sdk: ^3.6.0
 
 dependencies:
   flutter:
diff --git a/refilc_mobile_ui/pubspec.yaml b/refilc_mobile_ui/pubspec.yaml
index 0ccac7c..9bf847f 100644
--- a/refilc_mobile_ui/pubspec.yaml
+++ b/refilc_mobile_ui/pubspec.yaml
@@ -2,7 +2,7 @@ name: refilc_mobile_ui
 publish_to: "none"
 
 environment:
-  sdk: ">=3.3.2 <=3.6.0"
+  sdk: ^3.6.0
 
 dependencies:
   flutter: