diff --git a/pyproject.toml b/pyproject.toml
index 23ba8b3..a6e60b9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 # https://peps.python.org/pep-0517
 [build-system]
-requires = ["setuptools", "Cython"]
+requires = ["setuptools==71.0.0", "Cython"]
 build-backend = "setuptools.build_meta"
 
 # https://peps.python.org/pep-0621/