diff --git a/pyproject.toml b/pyproject.toml
index 8ad44a0..3816797 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,7 @@
 # package build
 # https://peps.python.org/pep-0517/
 [build-system]
-requires = ["setuptools>=65,<68", "wheel", "setuptools_scm[toml]>=6.2"]
+requires = ["setuptools>=65,<66", "wheel", "setuptools_scm[toml]>=6.2"]
 build-backend = "setuptools.build_meta"
 
 [tool.setuptools_scm]