The Food and Drug Administration has upgraded a recall of 6,344 bags of Lay’s Classic Potato Chips to its highest level of severity, warning of potentially serious or even deadly consequences from consuming the product. But if you’re not getting your chips in Oregon or Washington state, you have little to worry about.

Frito-Lay issued the initial recall in December of some of its 13-ounce bags of Lay’s Classic Potato Chips because they could contain “undeclared milk.”

On Monday, the FDA upgraded it to a Class I recall, according to the agency, which is a warning that consumption of the product — for those who have an allergy or sensitivity to milk — could cause “serious adverse health consequences or death.”

The recall affects consumers in Oregon and Washington state who bought the bags of chips as early as Nov. 3, 2024, according to the FDA.

The FDA has three classifications for recalls. Class I, the most severe notice, is “a situation in which there is a reasonable probability that the use of or exposure to a violative product will cause serious adverse health consequences or death,” the agency says on its website.

People with an allergy or severe sensitivity to milk are at risk. If you’re worried that you may have these chips in your pantry, here’s what you should look for: The bags must have a “guaranteed fresh” date of Feb. 11, 2025, and include the manufacturing code 6462307xx or 6463307xx.

No other products, flavors, sizes or variety packs by Lay’s have been recalled.