diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 3768e55..b2a730f 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -27,7 +27,7 @@ repos:
       - id: mixed-line-ending
       - id: trailing-whitespace
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.14.14
+    rev: v0.15.4
     hooks:
       - id: ruff
         args: [--fix, --exit-non-zero-on-fix]
diff --git a/src/androidtvremote2/androidtv_remote.py b/src/androidtvremote2/androidtv_remote.py
index ff0e4be..d7b53ff 100644
--- a/src/androidtvremote2/androidtv_remote.py
+++ b/src/androidtvremote2/androidtv_remote.py
@@ -3,12 +3,12 @@
 from __future__ import annotations
 
 import asyncio
-import os
 import ssl
 from typing import TYPE_CHECKING
 from urllib.parse import urlparse
 
 import aiofiles
+from aiofiles import os as aos
 from cryptography import x509
 
 from .certificate_generator import generate_selfsigned_cert
@@ -189,7 +189,7 @@ async def async_generate_cert_if_missing(self) -> bool:
 
         :returns: True if a new certificate was generated.
         """
-        if os.path.isfile(self._certfile) and os.path.isfile(self._keyfile):
+        if await aos.path.isfile(self._certfile) and await aos.path.isfile(self._keyfile):
             return False
         cert_pem, key_pem = generate_selfsigned_cert(self._client_name)
         async with aiofiles.open(self._certfile, "w", encoding="utf-8") as out:
diff --git a/src/demo.py b/src/demo.py
index 34604c6..2d0d129 100644
--- a/src/demo.py
+++ b/src/demo.py
@@ -1,4 +1,4 @@
-# ruff: noqa: T201, PLR0912, PLR0915
+# ruff: noqa: T201, PLR0912, PLR0915, ASYNC240, ASYNC250
 """Demo usage of AndroidTVRemote."""
 
 import argparse