When Jester King Brewery opens today, it will be selling a brand-new variant of one of its oldest beers.

The beer in question is CRU 55, a “Grand Cru” version of the Austin-based brewery’s RU55 sour red ale (6.7 percent ABV) that has been in its barrel room for three years. Originally released in 2012, RU55 is brewed with perle hops before being refermented in oak barrels with wild yeast and souring bacteria.

“Back when we started our program of spontaneous fermentation in February of 2013, we had an extra 130 gallon puncheon barrel (#487 to be precise), which we filled with our RU55 Barrel Aged Sour Red Ale,” reads a post on Jester King’s website. “After aging in our barrel room for three years, we decided to bottle and release it as the “Grand Cru” version of RU55.”

According to the brewery, CRU 55 will be packaged in 375ml bottles ($14) and will have a one bottle per person limit when it goes on sale today, with approximately 900 bottles available.