diff --git a/python/diff-nautobot-understack/pyproject.toml b/python/diff-nautobot-understack/pyproject.toml
index 325937074..b1ceafb7b 100644
--- a/python/diff-nautobot-understack/pyproject.toml
+++ b/python/diff-nautobot-understack/pyproject.toml
@@ -6,7 +6,7 @@ build-backend = "hatchling.build"
 name = "diff-nautobot-understack"
 description = "tool to compare data between Openstack and Nautobot"
 authors = [{ name = "Understack Developers" }]
-requires-python = ">=3.10"
+requires-python = ">=3.10,<3.14"
 readme = "README.md"
 dependencies = [
     "openstacksdk>=4.2.0,<5",
diff --git a/python/diff-nautobot-understack/uv.lock b/python/diff-nautobot-understack/uv.lock
index 75425b490..da8f6bc81 100644
--- a/python/diff-nautobot-understack/uv.lock
+++ b/python/diff-nautobot-understack/uv.lock
@@ -1,6 +1,6 @@
 version = 1
 revision = 3
-requires-python = ">=3.10"
+requires-python = ">=3.10, <3.14"
 
 [[package]]
 name = "annotated-types"