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Mario Kart 8 Deluxe 3.0.3 Update — A Chronicle

After updating, the version number appears:

Addressed minor issues to improve connection stability during online matches. How to Download the Update

Don't wait any longer to experience the improvements and enhancements that the Mario Kart 8 Deluxe 3.0.3 update has to offer. Head to the Nintendo eShop or System Menu, and download the update today!

  1. Highlight the Mario Kart 8 Deluxe icon on your Switch Home Menu.
  2. Press the + Button or - Button to open the Options menu.
  3. Select Software Update.
  4. Select Via the Internet.
  5. The system will check for the latest version. If Version 3.0.3 is not installed, the download will begin immediately.

Security Patch:

The update fixed a security flaw in the game's netcode related to a buffer overflow .