diff --git a/pyproject.toml b/pyproject.toml
index c1c483a74e..098195aa77 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -43,7 +43,7 @@ dependencies = [
   'mako>=1.1',
   'nanobind>=1.4.0 ',
   'ninja>=1.10',
-  'numpy>=1.23.3',
+  'numpy>=1.23.3,==1.*',
   'packaging>=20.0',
   'pybind11>=2.10.1',
   'setuptools>=65.5.0',