Costco is making masks mandatory for all shoppers starting next month.
Starting May 4, all customers will be required to wear face masks while shopping. Costco says it's insisting on face masks to protect customers and employees.
Kids under the age of two and people who can not wear masks because of medical issues are exempt.
The warehouse store has already implemented other rules aimed at keeping people safe, like limiting the number of people allowed in each store, marking the floors so customers stay 6 feet apart while waiting to check out.
Costco was one of the first stores to set aside early morning hours to allow older people and people with disabilities to shop safely.