One of Brasserie-Brouwerij Cantillon’s regularly produced creations is undergoing a major change next year.

The Belgium-based brewery has announced it will be making some significant changes to Vigneronne, a beer produced by placing fresh, whole grapes into stainless steel tanks with two-to three-year-old lambic for a period of between one to two months.

While the annually produced beer has historically been made with Muscat table grapes, after failing to find any organic Muscat wine grapes, Cantillon decided to switch to organic Viognier grapes that are grown in the “Minervois area in the South of France, cultivated in a more natural way on a clay-limestone soil.”

“As you know, here at Cantillon we take the utmost care to produce our beer as naturally as possible,” reads a post on Cantillon’s Facebook page. “Because the Muscat grapes used for the Vigneronne were not organic, we decided to move to an organic producer and to use wine grapes instead of table grapes. After some research, we couldn’t find organic Muscat, but we did find organic Viognier grapes.”

Although Cantillon owner Jean-Pierre Van Roy had produced white grape lambic as early as 1973, the first bottle of Vigneronne was not imported into the U.S. until 1989.

According to Cantillon, the new version of Vigneronne is expected to be ready in spring of 2020 and will retain the same name, but the label will be changed “to avoid any confusion between past releases with Muscat grapes.”