diff --git a/setup.cfg b/setup.cfg
index 09ebaa24..cf7c7349 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -4,8 +4,9 @@ setup_requires =
     numpy >= 1.19.5
     cython >= 3.0.7
 
+python_requires = >=3.9
+
 install_requires =
-    python >= 3.9
     numpy >= 1.19.5
     scipy >= 1.10.1, < 1.13.0
     cython >= 3.0.7