Sinéad O’Connor’s official cause of death has been determined to be chronic obstructive pulmonary disease and asthma.

The cause of death was disclosed in O’Connor’s death certificate, which was filed by the late singer’s family earlier this week, according to the Irish Independent. The death certificate was filed a year after O’Connor was found dead at her London flat on July 26th, 2023. At the time of her passing, O’Connor was 56 years old.

O’Connor’s death was initially ruled as the result of “natural causes,” but the death certificate provided specific details on the reasons behind her passing. It specifically cites an “exacerbation of chronic obstructive pulmonary disease and bronchial asthma together with a low-grade lower respiratory tract infection.”

Even a year after her passing, tributes to O’Connor continue to pour in. Last month, Eddie Vedder honored the singer during Pearl Jam’s concert in Dublin by covering Warren Zevon’s “Keep Me in Your Heart.” Meanwhile, O’Connor’s daughter, Roisin Waters, delivered a knockout performance of “Nothing Compares 2 U” at a tribute concert to her mother.

All tributes aren’t good tributes though, as Dublin’s National Wax Museum discovered last week.

See our list of the 10 Essential Sinéad O’Connor Songs That Aren’t “Nothing Compares 2 U.”