Fast food giant McDonald’s is looking to shake things up with the big announcement that it wills tart selling Monster energy drinks at some of its stores.

McDonald’s confirmed that it will be testing Monster drinks in 20 stores in the United States, as the company seeks to test a new addition to its menu based on its feedback from customers, according to the Chicago Tribune.

McDonald’s has been focusing on expanding its drink offerings lately, pushing the McCafe menu in an attempt to retain customers as it is starting to lose market share and see profits start to sink. Monster will be its latest attempt to try to keep current with its offerings.

Customers who order a Monster energy drink with their value meal will have to pay $1.50 extra compared to ordering a regular drink.

Monster drinks are one of the most popular energy drinks on the market. The heavily caffeinated beverages come in 16-ounce cans. McDonald’s will offer two versions: the standard Monster Energy “Green” and the Zero Ultra. They will be displayed in a refrigerated case.

McDonald’s has been struggling with diving sales in the last seven quarters, but the company has been pushing hard to make some big changes, including the recently announced all-day breakfast.

Despite recent struggles, McDonald’s remains the world’s largest fast food restaurant, serving about 68 million customers every single day across 119 countries, and operating about 35,000 outlets. It was started back in 1940 as a barbecue restaurant, and was run by Richard and Maurice McDonald, before it was turned into a hamburger chain in 1948. They sold it to businessman Ray Kroc in 1955, who turned it into the behemoth it is today.

Monster has been active itself. This partnership would be a major coup for the company as it seeks to compete against tough competitors like Red Bull.

The company announced in September that it would authorize a new share repurchase program of up to $500 million of outstanding common stock. The press release for that announcement can be found here.