diff --git a/pyproject.toml b/pyproject.toml
index 635337d62a..36b117c3d9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,7 +7,7 @@ name = "modal"
 description = "Python client library for Modal"
 readme = "README.md"
 dynamic = ["version"]
-requires-python = ">=3.9"
+requires-python = ">=3.9,<3.14"
 license = {text = "Apache-2.0"}
 
 authors = [