diff --git a/setup.py b/setup.py
index 3097aff54..6f2793444 100644
--- a/setup.py
+++ b/setup.py
@@ -280,7 +280,7 @@ def run(self):
        packages = ["PyPop", "PyPop.xslt"],
        package_data = {"PyPop.xslt": xslt_data_file_paths,
                        "PyPop": citation_data_file_paths},
-       install_requires = ["numpy <= 2.1.3",
+       install_requires = ["numpy <= 2.2.0",
                            "lxml <= 5.3.0",
                            "importlib-resources; python_version <= '3.8'",
                            "importlib-metadata; python_version <= '3.8'"],