diff --git a/pyproject.toml b/pyproject.toml
index f799ae1d..ff99f7ee 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -16,7 +16,8 @@ requires = [
     # Note that building against numpy 1.x works fine too - users and
     # redistributors can do this by installing the numpy version they like and
     # disabling build isolation.
-    "numpy>=2.0.0b1",
+    "numpy>=2.0.0; python_version<'3.13'",
+    "numpy>=2.1.0.rc1; python_version>='3.13'",
 ]
 
 [project]