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(WJW) — McDonald’s is offering a free six-piece McNuggets to celebrate 40 years of the menu item.

According to a press release, the free deal is good on Wednesday, Jan. 18 only. No purchase is necessary, but customers must use the McDonald’s app to order.

There is a limit of one per customer. App download and registration is required.

According to McDonalds’ website, McNuggets are made with all-white meat chicken, no artificial colors, flavors or preservatives.

To download the app, click here.