Lagunitas Brewing Co. is going dark for its next OneHitter Series release.

The beer in question is Dark Swan, an 8.7 percent ABV sour ale that was first released as a draft-only option in 2016. The ale will join four other bottled beers in Lagunitas’ OneHitter Series, which is made up of seasonal releases:

According to a label filed with the Alcohol and Tobacco Tax and Trade Bureau (TTB), Dark Swan  will be packaged in 12-ounce bottles. An email sent to the brewery for additional information was not immediately returned.