diff --git a/.tool-versions b/.tool-versions
index 7139565..fe62b5c 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1,2 +1,2 @@
 poetry 2.1.4
-python 3.13.5 3.12.11 3.11.13 3.10.18 3.9.23
+python 3.14.2 3.13.5 3.12.11 3.11.13 3.10.18 3.9.23
diff --git a/nhs_aws_helpers/common.py b/nhs_aws_helpers/common.py
index aff7d4b..4fb20d3 100644
--- a/nhs_aws_helpers/common.py
+++ b/nhs_aws_helpers/common.py
@@ -42,7 +42,7 @@ def optional_origin_type(original_type: type) -> type:
     """
     if the target type is Optional or a Union[xxx, None] this will return the wrapped type
     """
-    if original_type.__class__.__name__ not in ("_UnionGenericAlias", "UnionType", "_GenericAlias"):
+    if original_type.__class__.__name__ not in ("_UnionGenericAlias", "UnionType", "_GenericAlias", "Union"):
         return original_type
     args = typing.get_args(original_type)
     if len(args) != 2:
diff --git a/pyproject.toml b/pyproject.toml
index a154d64..9b9a9d4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -139,7 +139,7 @@ check_untyped_defs = true
 [tool.tox]
 legacy_tox_ini = """
 [tox]
-envlist = py39,py310,py311,py312,py313
+envlist = py39,py310,py311,py312,py313,py314
 
 [gh-actions]
 python =
@@ -148,6 +148,7 @@ python =
     3.11: py311
     3.12: py312
     3.13: py313
+    3.14: py314
 
 [testenv]
 deps =