diff --git a/pyproject.toml b/pyproject.toml
index 0054e72..31c6e90 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,5 @@
 [build-system]
-requires = ["setuptools", "wheel", "cython>=3.0"]
+requires = ["setuptools", "wheel", "cython>=3.0", "cmake>=3.18"]
 build-backend = "setuptools.build_meta"
 
 [project]