Kristine Opolais has canceled her upcoming performances of Dvorak’s Stabat Mater with the Boston Symphony Orchestra.

In a statement, the soprano noted that her voice had changed and therefore she would be retiring the work from her repertoire.

She said “I loved singing ‘Suor Angelica’ at the Met earlier this season and I very much look forward to revisiting this gorgeous and heart-breaking role with the incredible Boston Symphony Orchestra, Andris Nelsons, and Violeta Urmana on February 21 & 23!”

She continued, “I also want to share with you that I have decided to withdraw from the performances of Dvořák’s ‘Stabat Mater’ with the BSO following Angelica. Dvořák’s music is of course very close to my heart, but as I continue my journey through different repertoire my voice is changing and this work is no longer a perfect fit for me vocally. After thoughtful deliberation, I decided to remove it from my repertoire and very much look forward to ‘Suor Angelica.’”

Rachel Willis-Sørensen will replace Opolais in a cast that also includes Violetta Urmana, Dmytro Popov, and Ain Anger. Andris Nelsens conducts performance on Feb. 26, 2019.