If you own the game legally, you can update to the latest version (3.0.3) safely by: Connecting your Switch to the Highlighting the Mario Kart 8 Deluxe icon on the home screen. Pressing the and selecting Software Update Via the Internet If you'd like, I can help you with: Finding the best current prices for a legitimate copy of the game. Explaining the new features and tracks added in the latest version 3.0.3. Troubleshooting official update errors on your console.