diff --git a/pyproject.toml b/pyproject.toml
index e8cf77fd..27ee6941 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,7 +3,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
 [build-system]
-requires = ["setuptools>=40.8.0", "wheel", "cython<3.0.0", "numpy>=1.23.5"]
+requires = ["setuptools>=40.8.0", "wheel", "cython<3.0.0", "numpy>=1.23.5,<2.0.0"]
 build-backend = "setuptools.build_meta"
 
 [project]