diff --git a/src/runboat/api.py b/src/runboat/api.py
index 7bced44..bfb797c 100644
--- a/src/runboat/api.py
+++ b/src/runboat/api.py
@@ -1,5 +1,5 @@
 import datetime
-from typing import List, Optional
+from typing import Optional
 
 from fastapi import APIRouter, Depends, HTTPException, status
 from fastapi.responses import StreamingResponse
@@ -69,14 +69,14 @@ async def controller_status():
     return controller
 
 
-@router.get("/repos", response_model=List[Repo])
+@router.get("/repos", response_model=list[Repo])
 async def repos():
     return [models.Repo(name=name) for name in settings.supported_repos]
 
 
 @router.get(
     "/repos/{org}/{repo}/branches-and-pulls",
-    response_model=List[BranchOrPull],
+    response_model=list[BranchOrPull],
     response_model_exclude_none=True,
 )
 async def branches_and_pulls(org: str, repo: str):
diff --git a/src/runboat/k8s.py b/src/runboat/k8s.py
index 7bf6f62..526e739 100644
--- a/src/runboat/k8s.py
+++ b/src/runboat/k8s.py
@@ -5,7 +5,7 @@ import tempfile
 from contextlib import contextmanager
 from importlib import resources
 from pathlib import Path
-from typing import Any, AsyncGenerator, Dict, Generator, List, Optional, Tuple
+from typing import Any, AsyncGenerator, Generator, Optional
 
 from jinja2 import Template
 from kubernetes_asyncio import client, config, watch
@@ -16,7 +16,7 @@ from pydantic import BaseModel
 from .settings import settings
 
 
-def _split_image_name_tag(img: str) -> Tuple[str, str]:
+def _split_image_name_tag(img: str) -> tuple[str, str]:
     if ":" in img:
         return img.split(":", 2)
     return (img, "latest")
@@ -26,7 +26,7 @@ async def load_kube_config() -> None:
     await config.load_kube_config()
 
 
-async def patch_deployment(deployment_name: str, ops: List[Dict["str", Any]]) -> None:
+async def patch_deployment(deployment_name: str, ops: list[dict["str", Any]]) -> None:
     async with ApiClient() as api:
         appsv1 = client.AppsV1Api(api)
         await appsv1.patch_namespaced_deployment(
@@ -36,7 +36,7 @@ async def patch_deployment(deployment_name: str, ops: List[Dict["str", Any]]) ->
         )
 
 
-async def watch_deployments() -> AsyncGenerator[Tuple[str, V1Deployment], None]:
+async def watch_deployments() -> AsyncGenerator[tuple[str, V1Deployment], None]:
     w = watch.Watch()
     # use the context manager to close http sessions automatically
     async with ApiClient() as api:
@@ -109,7 +109,7 @@ def _render_kubefiles(deployment_vars: DeploymentVars) -> Generator[Path, None,
         yield tmp_path
 
 
-async def _kubectl(args: List[str]) -> None:
+async def _kubectl(args: list[str]) -> None:
     proc = await asyncio.create_subprocess_exec("kubectl", *args)
     return_code = await proc.wait()
     if return_code != 0: