In exactly two weeks, New Glarus Brewing Co. will be releasing the its first R&D beer of the year, and it might look a bit familiar to fans.

Sour Porter is a 6.25 percent ABV porter brewed with black floor malted barley before being spontaneously fermented and aged in oak barrels. A label posted on New Glarus, Wis.-based brewery’s Facebook page indicates that the beer was brewed in Feb. 2017 and bottled in April of this year.

If that beer sounds a bit familiar, it might be because it bears a striking resemblance to a beer in the brewery’s Unplugged Series named Old English Porter, which was a 5.5 percent ABV porter package in four-packs of 12-ounce bottles and released in 2009. Sour Porter is the first of three different beers in the brewery’s R&D Series to be sold this year: the second beer in this year’s series is scheduled to be released on August 11 during the Great Taste of the Midwest with the final beer coming on Sept. 22 during the brewery’s Oktoberfest celebration.

In addition to Sour Porter, New Glarus will also be selling bottles of Abtsolution, a 9 percent ABV Belgian-style dark ale brewed with Chinook and Santium hops as well as milk lactose. The new ale is a collaboration with Dirk Naudts of De Proefbrouwerij in Lochristi, Belgium.

According to a post on New Glarus’ Facebook page, R&D Sour Porter will be packaged in 500ml bottles ($15) with a four bottle per person per day limit, while Abtsolution will be packaged in 750ml bottles ($15) and will have a two bottle per person limit. Both beers will be available at New Glarus starting on June 9.