diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index 0cfeb18c9..82f27a315 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -16,10 +16,10 @@ dependencies {
 
 javafx {
     modules = listOf("javafx.base", "javafx.fxml", "javafx.web", "javafx.swing")
-    version = "20.0.+"
+    version = "21.0.+"
 }
 
-version = "0.22.0"
+version = "0.23.0-SNAPSHOT"
 
 val mainClassName = "org.jskat.JSkatKt"
 
diff --git a/build-logic/src/main/kotlin/jskat.java-common-conventions.gradle.kts b/build-logic/src/main/kotlin/jskat.java-common-conventions.gradle.kts
index 707bb3f8a..d0e51e58f 100644
--- a/build-logic/src/main/kotlin/jskat.java-common-conventions.gradle.kts
+++ b/build-logic/src/main/kotlin/jskat.java-common-conventions.gradle.kts
@@ -9,20 +9,20 @@ repositories {
 }
 
 dependencies {
-    implementation("org.slf4j:slf4j-api:2.0.7")
-    implementation("ch.qos.logback:logback-classic:1.4.6")
-    implementation("com.google.guava:guava:31.1-jre")
+    implementation("org.slf4j:slf4j-api:2.0.9")
+    implementation("ch.qos.logback:logback-classic:1.4.11")
+    implementation("com.google.guava:guava:32.1.3-jre")
 
-    testImplementation("org.junit.jupiter:junit-jupiter-api:5.9.2")
-    testImplementation("org.junit.jupiter:junit-jupiter-params:5.9.2")
-    testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine:5.9.2")
-    testImplementation("org.mockito:mockito-core:5.2.0")
+    testImplementation("org.junit.jupiter:junit-jupiter-api:5.10.0")
+    testImplementation("org.junit.jupiter:junit-jupiter-params:5.10.0")
+    testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine:5.10.0")
+    testImplementation("org.mockito:mockito-core:5.6.0")
     testImplementation("org.assertj:assertj-core:3.24.2")
 }
 
 java {
-    sourceCompatibility = JavaVersion.VERSION_17
-    targetCompatibility = JavaVersion.VERSION_17
+    sourceCompatibility = JavaVersion.VERSION_20
+    targetCompatibility = JavaVersion.VERSION_20
 
     withSourcesJar()
     withJavadocJar()
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index bdc9a83b1..744c64d12 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.0.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.4-bin.zip
 networkTimeout=10000
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/jskat-javafx-gui/build.gradle.kts b/jskat-javafx-gui/build.gradle.kts
index b5a823267..3f5e58ebd 100644
--- a/jskat-javafx-gui/build.gradle.kts
+++ b/jskat-javafx-gui/build.gradle.kts
@@ -11,5 +11,5 @@ dependencies {
 
 javafx {
     modules = listOf("javafx.base", "javafx.fxml", "javafx.web", "javafx.swing")
-    version = "20.0.+"
+    version = "21.0.+"
 }
diff --git a/jskat-javafx-gui/src/main/java/org/jskat/JSkatFX.java b/jskat-javafx-gui/src/main/java/org/jskat/JSkatFX.java
index 4f1d2e2c0..325bded43 100644
--- a/jskat-javafx-gui/src/main/java/org/jskat/JSkatFX.java
+++ b/jskat-javafx-gui/src/main/java/org/jskat/JSkatFX.java
@@ -33,6 +33,8 @@
 import org.jskat.gui.swing.LookAndFeelSetter;
 import org.jskat.util.JSkatResourceBundle;
 import org.jskat.util.version.VersionChecker;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import javax.swing.*;
 import java.awt.*;
@@ -40,7 +42,8 @@
 
 public class JSkatFX extends Application {
 
-    private static final String VERSION = "0.22.0";
+    private static final Logger LOG = LoggerFactory.getLogger(JSkatFX.class);
+    private static final String VERSION = "0.23.0";
 
     private static final int SPLASH_WIDTH = 500;
     private static final int SPLASH_HEIGHT = 300;
@@ -126,27 +129,25 @@ private static void showNewMainWindow(final Screen targetScreen, final Point2D s
         final VBox rootLayout = loader.load();
 
         final Dimension2D dimension = getMainWindowDimension(targetScreen);
+        LOG.info("Main window size {}x{}", dimension.getWidth(), dimension.getHeight());
         final Scene scene = new Scene(rootLayout, dimension.getWidth(), dimension.getHeight());
 
         // TODO: set this globally
         scene.getStylesheets().add("/org/jskat/gui/javafx/jskat.css");
 
-        scene.widthProperty().addListener(
-                (observable, oldValue, newValue) -> JSkatOptions.instance().setMainFrameWidth(newValue.intValue()));
-        scene.heightProperty().addListener(
-                (observable, oldValue, newValue) -> JSkatOptions.instance().setMainFrameHeight(newValue.intValue()));
+        scene.widthProperty().addListener((observable, oldValue, newValue) -> JSkatOptions.instance().setMainFrameWidth(newValue.intValue()));
+        scene.heightProperty().addListener((observable, oldValue, newValue) -> JSkatOptions.instance().setMainFrameHeight(newValue.intValue()));
 
         final Stage stage = new Stage();
         stage.setTitle("JSkat " + version);
-        stage.setScene(scene);
         stage.setOnCloseRequest(event -> JSkatMaster.INSTANCE.exitJSkat());
 
-        stage.xProperty().addListener((observable, oldValue, newValue) ->
-                JSkatOptions.instance().setMainFrameXPosition(newValue.intValue()));
-        stage.yProperty().addListener((observable, oldValue, newValue) ->
-                JSkatOptions.instance().setMainFrameYPosition(newValue.intValue()));
+        stage.setScene(scene);
 
-        stage.setOnCloseRequest(event -> JSkatMaster.INSTANCE.exitJSkat());
+        stage.setWidth(dimension.getWidth());
+        stage.setHeight(dimension.getHeight());
+        stage.xProperty().addListener((observable, oldValue, newValue) -> JSkatOptions.instance().setMainFrameXPosition(newValue.intValue()));
+        stage.yProperty().addListener((observable, oldValue, newValue) -> JSkatOptions.instance().setMainFrameYPosition(newValue.intValue()));
 
         placeMainWindow(targetScreen, stage, screenPosition);
 
@@ -158,11 +159,11 @@ private void showSplashScreen(final Screen targetScreen, final Stage splashStage
 
         final ImageView splashScreenImage = new ImageView(
                 new Image(ClassLoader.getSystemResourceAsStream("org/jskat/gui/img/gui/splash.png")));
-        ProgressBar splashScreenProgressBar = new ProgressBar();
+        final ProgressBar splashScreenProgressBar = new ProgressBar();
         splashScreenProgressBar.setPrefWidth(SPLASH_WIDTH);
-        Label splashScreenProgressText = new Label("Loading JSkat...");
+        final Label splashScreenProgressText = new Label("Loading JSkat...");
         splashScreenProgressText.setAlignment(Pos.CENTER);
-        VBox splashScreenLayout = new VBox();
+        final VBox splashScreenLayout = new VBox();
         splashScreenLayout.getChildren().addAll(splashScreenImage, splashScreenProgressBar, splashScreenProgressText);
         splashScreenLayout.setStyle("-fx-padding: 5; -fx-spacing: 5; -fx-border-width:2;");
         splashScreenLayout.setEffect(new DropShadow());
diff --git a/jskat-swing-gui/build.gradle.kts b/jskat-swing-gui/build.gradle.kts
index ff8aa5465..29db9171d 100644
--- a/jskat-swing-gui/build.gradle.kts
+++ b/jskat-swing-gui/build.gradle.kts
@@ -12,5 +12,5 @@ dependencies {
 
 javafx {
     modules = listOf("javafx.controls")
-    version = "20.0.+"
+    version = "21.0.+"
 }