diff --git a/pyproject.toml b/pyproject.toml
index 12296ac..7ce4790 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,4 +1,4 @@
 [build-system]
-requires = ["setuptools>=49.5.0", "pybind11"]
+requires = ["setuptools>=49.5.0", "pybind11", "cmake"]
 build-backend = "setuptools.build_meta"