diff --git a/pyproject.toml b/pyproject.toml
index f7f68b84b..09a445d28 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -11,7 +11,7 @@ authors = [
 readme = "README.rst"
 license = { file = "LICENSE" }
 keywords = ["pyiron"]
-requires-python = ">=3.9 <3.13"
+requires-python = ">=3.9, <3.13"
 classifiers = [
     "Development Status :: 5 - Production/Stable",
     "Topic :: Scientific/Engineering :: Physics",