Upgrade Empty Cabins mod allows you to upgrade your inventory to the most recent version, including all the newest items.

This mod does not require any changes to your game, and it will not affect your overall game experience. All you have to do is download this mod, unzip it into the /Mods folder, and then start using it.

The way this works is that the players can go to Stardew Valley and buy new items. When they're finished, they'll be able to find their new items in the inventory.