diff --git a/pyproject.toml b/pyproject.toml
index d4a9ddd19..edb60ff23 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -16,7 +16,7 @@
 # without any warranty.
 
 [build-system]
-requires = ['pip>=20.3', 'setuptools>=61', 'wheel']
+requires = ['pip>=20.3', 'setuptools>=61,<71', 'wheel']
 build-backend = 'setuptools.build_meta'
 
 [project]