diff --git a/pyproject.toml b/pyproject.toml
index ffb4cbf..2976fab 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -20,4 +20,4 @@ before-all = [
 ]
 
 [tool.cibuildwheel.macos]
-before-all = "brew install fftw"
+before-all = "brew install fftw pkg-config"