Quick service restaurant chain Shake Shack is increasing its commitment to cage-free eggs, stating that it will source all of its eggs from cage-free farms by the end of 2016.

The company has already been using cage-free eggs in some of its menu items. Since it first introduced its breakfast line in 2013, it sourced cage-free eggs for its Egg N’ Cheese sandwiches. It also uses cage-free eggs for its Buttermilk Herb Mayo served on the Chick’n Shack.  

“We know we can always do better, which is why we’re committed to transitioning to the use of cage-free eggs for our final two menu items by the end of 2016: our ShackSauce and frozen custard. At that point, our entire menu will use cage-free eggs,” the company stated in on its website. “It’s important to us that our beliefs are clear to our team, guests and suppliers. To set things in stone, we’ve been working hard this year on developing a public sourcing commitment, which we expect to announce by mid-2016.

Shake Shack, founded in 2004 and headquartered in New York, has multiple locations in 12 U.S. states and in the District of Columbia. The chain also has an international presence, with locations in major cities including London, Istanbul, Dubai and Moscow. The company’s mission, according to the Shake Shack website, is to “Stand for Something Good.”

A publicly traded company, Shake Shack is listed in the New York Stock Exchange under the symbol SHAK.