diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index b057184..9c00680 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -18,7 +18,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.9', '3.10', '3.11', '3.12']
+        python-version: ['3.10', '3.11', '3.12']
 
     steps:
       - uses: actions/checkout@v4
diff --git a/pyproject.toml b/pyproject.toml
index 7079000..82b0b69 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -30,7 +30,7 @@ include = ["src/lvmnps/actor/schema.json"]
 lvmnps = "lvmnps.__main__:main"
 
 [tool.poetry.dependencies]
-python = ">=3.9,<4.0"
+python = ">=3.10,<4.0"
 sdsstools = "^1.0.0"
 click-default-group = "^1.2.2"
 sdss-clu = "^2.0.0"
diff --git a/src/lvmnps/nps/core.py b/src/lvmnps/nps/core.py
index d5a3e70..87991ed 100644
--- a/src/lvmnps/nps/core.py
+++ b/src/lvmnps/nps/core.py
@@ -11,7 +11,7 @@
 import abc
 import asyncio
 
-from typing import Any, Sequence, TypedDict, Union
+from typing import Any, Sequence, TypedDict
 
 from pydantic import BaseModel, ConfigDict
 
@@ -61,8 +61,7 @@ async def off(self):
         await self._client.set_state(self, on=False)
 
 
-# Unions needed for Python 3.9
-OutletArgType = Union[OutletModel, int, str, Sequence[Union[str, int, OutletModel]]]
+OutletArgType = OutletModel | int | str | Sequence[str | int | OutletModel]
 
 
 class ImplementationsDict(TypedDict):