One of the top egg producers in the U.S. confirmed that a farm tested positive for cases of bird flu over the weekend, the company said in a statement Tuesday.

The Department of Agriculture warned egg prices may increase more than 20% this year, after December saw a year-over-year increase of 36.8%.

As the bird flu continues to force farmers to slaughter millions of chickens nationwide every month, the price of eggs is skyrocketing.