Willie Nelson announced Wednesday that he’s canceling the remainder of his current tour due to health issues. “To my fans, I’m sorry to cancel my tour, but I have a breathing problem that I need to have my doctor check out,” the 86-year-old country icon wrote on social media. “I’ll be back. Love, Willie.” ET notes that Nelson’s tour with Alison Krauss was next set to play Grand Rapids, Michigan, on Friday. It’s unknown whether all of Nelson’s 30 remaining tour dates have been canceled. As of Thursday morning, his website still lists his scheduled tour dates through late November.