diff --git a/pyproject.toml b/pyproject.toml
index 84c62561..0a50b5bc 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,5 @@
 [build-system]
-requires = ["scikit-build-core>=0.4", "nanobind>=1.8"]
+requires = ["scikit-build-core>=0.4", "nanobind>=1.8", "nanobind<3; python_version < '3.10'"]
 build-backend = "scikit_build_core.build"
 
 [project]