diff --git a/pyproject.toml b/pyproject.toml
index 970ae21..e450218 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -48,7 +48,7 @@ mpd-now-playable = 'mpd_now_playable.cli:main'
 start = {call = 'mpd_now_playable.cli:main'}
 lint = 'ruff check src/mpd_now_playable'
 typecheck = 'mypy -p mpd_now_playable'
-check = {composite = ['lint', 'typecheck']}
+check = {composite = ['lint', 'typecheck'], keep_going = true}
 
 [tool.pdm.version]
 source = "scm"
@@ -71,7 +71,7 @@ dev = [
 [tool.mypy]
 mypy_path = 'stubs'
 
-[tool.ruff]
+[tool.ruff.lint]
 ignore-init-module-imports = true
 select = [
     # pycodestyle
diff --git a/src/mpd_now_playable/cache.py b/src/mpd_now_playable/cache.py
index 8682058..0973a5f 100644
--- a/src/mpd_now_playable/cache.py
+++ b/src/mpd_now_playable/cache.py
@@ -19,10 +19,10 @@ with suppress(ImportError):
 class OrmsgpackSerializer(BaseSerializer):
 	DEFAULT_ENCODING = None
 
-	def dumps(self, value: Any) -> bytes:
+	def dumps(self, value: object) -> bytes:
 		return ormsgpack.packb(value)
 
-	def loads(self, value: Optional[bytes]) -> Any:
+	def loads(self, value: Optional[bytes]) -> object:
 		if value is None:
 			return None
 		return ormsgpack.unpackb(value)