diff --git a/pyproject.toml b/pyproject.toml
index a6db125..1b7a5d0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,5 +4,6 @@ requires = [
   "wheel",
   "cython>=0.23.3",
   'oldest-supported-numpy; os_name != "nt" and python_version < "3.9"',
-  'numpy>=2.0.0; os_name == "nt" and python_version >= "3.9"',
+  'numpy; os_name == "nt" and python_version < "3.9"',
+  'numpy>=2.0.0; python_version >= "3.9"',
 ]