diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 20ff7f0b88df7a031e1f28984466c23bff378469..12948e8cdec8f4811b441d31789b70d596ba07b8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -45,7 +45,7 @@ jobs:
           sudo apt-get install -y xvfb herbstluftwm
         elif [ "${{ matrix.os }}" = "macos-latest" ]; then
           brew install coreutils
-          brew cask install xquartz
+          brew install --cask xquartz
         fi
 
     - name: Set up Python