One of Firestone Walker Brewing Co.’s most popular beers is returning next week, but in smaller bottles.

The beer is Parabola, a 14.5 percent ABV Russian imperial stout brewed with hallertau and Zeus hops along with nine different malts before being aged in a blend of bourbon barrels sourced from Elijah Craig, Four Roses, Pappy Van Winkle, Woodford Reserve and Buffalo Trace for one year. The stout is part of the Paso Robles, Calif.-based brewery’s Proprietor’s Vintage Series and was first released in 2009.

While Parabola and the other members of the Proprietor’s Vintage Series have historically been packaged in 22-ounce bottles, all of the releases will be sold in smaller 12-ounce bottles in 2017.

According to a post on Firestone Walker’s Facebook page, Parabola will be packaged in 12-ounce bottles ($9.99) and will be released on March 25 during an event at the brewery with a limit of 12 bottles per person. Bottles will then begin to show up on retailer’s shelves across the brewery’s distribution network throughout the month of April.