(Reuters) —McDonald’s will offer its first 100 percent organic beef hamburger for a limited time in Germany.

The fast food chain will offer McB burgers, made with beef sourced from organic farms in Germany and Austria, from Oct. 1 to Nov. 18.

The company is revamping food-sourcing practices as part of new chief executive officer Steve Easterbrook’s effort to transform McDonald’s into a “modern, progressive burger company.”