diff --git a/app/src/main/java/org/secuso/privacyfriendlysudoku/ui/GameActivity.java b/app/src/main/java/org/secuso/privacyfriendlysudoku/ui/GameActivity.java
index 80b9bf4..6a504e8 100644
--- a/app/src/main/java/org/secuso/privacyfriendlysudoku/ui/GameActivity.java
+++ b/app/src/main/java/org/secuso/privacyfriendlysudoku/ui/GameActivity.java
@@ -17,6 +17,8 @@ import android.os.Bundle;
 import android.preference.PreferenceActivity;
 import android.preference.PreferenceManager;
 import com.google.android.material.navigation.NavigationView;
+
+import androidx.appcompat.app.AppCompatDelegate;
 import androidx.core.view.GravityCompat;
 import androidx.drawerlayout.widget.DrawerLayout;
 import androidx.appcompat.app.ActionBarDrawerToggle;
@@ -96,6 +98,12 @@ public class GameActivity extends BaseActivity implements NavigationView.OnNavig
 
         SharedPreferences sharedPref = PreferenceManager.getDefaultSharedPreferences(this);
 
+        if (sharedPref.getBoolean("pref_dark_mode_setting", false )) {
+            AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES);
+        } else {
+            AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_NO);
+        }
+
         if(sharedPref.getBoolean("pref_keep_screen_on", true)) {
             getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
         }