diff --git a/pyproject.toml b/pyproject.toml
index e24153d..15a1540 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -2,7 +2,7 @@
 requires = [
     "setuptools>=42",
     "wheel",
-    "pybind11>=2.6.0",
+    "pybind11<2.13",
     "numpy",
     "pytest"
 ]