diff --git a/pyproject.toml b/pyproject.toml
index 92639bb8b..6c32e194c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -216,6 +216,9 @@ ignore = [
     # We have an existing interface to support and so we do not want to change
     # exception names.
     "N818",
+    # Ignore this as there is a bug in ruff:
+    # See https://github.com/astral-sh/ruff/issues/6454.
+    "PLE1205",
     # Ignore "too-many-*" errors as they seem to get in the way more than
     # helping.
     "PLR0913",
@@ -307,7 +310,7 @@ dev = [
     "pytest-cov==4.1.0",
     "pytest==7.4.0",
     "requests-mock-flask==2023.5.14",
-    "ruff==0.0.282",
+    "ruff==0.0.283",
     "sphinx-autodoc-typehints==1.24.0",
     "sphinx-prompt==1.5.0",
     "sphinx_paramlinks==0.5.4",
diff --git a/src/mock_vws/_requests_mock_server/decorators.py b/src/mock_vws/_requests_mock_server/decorators.py
index 8456dd942..8f70d953e 100644
--- a/src/mock_vws/_requests_mock_server/decorators.py
+++ b/src/mock_vws/_requests_mock_server/decorators.py
@@ -6,7 +6,7 @@
 
 import re
 from contextlib import ContextDecorator
-from typing import TYPE_CHECKING, Literal
+from typing import TYPE_CHECKING, Literal, Self
 from urllib.parse import urljoin, urlparse
 
 import requests
@@ -42,7 +42,7 @@ def __init__(
         base_vwq_url: str = "https://cloudreco.vuforia.com",
         duplicate_match_checker: ImageMatcher = _AVERAGE_HASH_MATCHER,
         query_match_checker: ImageMatcher = _AVERAGE_HASH_MATCHER,
-        processing_time_seconds: int | float = 2,
+        processing_time_seconds: float = 2,
         target_tracking_rater: TargetTrackingRater = _BRISQUE_TRACKING_RATER,
         *,
         real_http: bool = False,
@@ -112,7 +112,7 @@ def add_database(self, database: VuforiaDatabase) -> None:
         """
         self._target_manager.add_database(database=database)
 
-    def __enter__(self) -> MockVWS:
+    def __enter__(self) -> Self:
         """
         Start an instance of a Vuforia mock.
 
@@ -151,7 +151,7 @@ def __enter__(self) -> MockVWS:
 
         return self
 
-    def __exit__(self, *exc: tuple[None, None, None]) -> Literal[False]:
+    def __exit__(self, *exc: object) -> Literal[False]:
         """
         Stop the Vuforia mock.
 
diff --git a/src/mock_vws/_requests_mock_server/mock_web_services_api.py b/src/mock_vws/_requests_mock_server/mock_web_services_api.py
index a6f40a881..d2128cf57 100644
--- a/src/mock_vws/_requests_mock_server/mock_web_services_api.py
+++ b/src/mock_vws/_requests_mock_server/mock_web_services_api.py
@@ -94,7 +94,7 @@ class MockVuforiaWebServicesAPI:
     def __init__(
         self,
         target_manager: TargetManager,
-        processing_time_seconds: int | float,
+        processing_time_seconds: float,
         duplicate_match_checker: ImageMatcher,
         target_tracking_rater: TargetTrackingRater,
     ) -> None:
diff --git a/src/mock_vws/_services_validators/name_validators.py b/src/mock_vws/_services_validators/name_validators.py
index fc4fccf4c..b16c60c59 100644
--- a/src/mock_vws/_services_validators/name_validators.py
+++ b/src/mock_vws/_services_validators/name_validators.py
@@ -226,5 +226,5 @@ def validate_name_does_not_exist_existing_target(
     if matching_name_target.target_id == target_id:
         return
 
-    _LOGGER.warning(msg="Name already exists for another target.")
+    _LOGGER.warning("Name already exists for another target.")
     raise TargetNameExist
diff --git a/tests/mock_vws/utils/__init__.py b/tests/mock_vws/utils/__init__.py
index 6b2f60dd2..0ba42047c 100644
--- a/tests/mock_vws/utils/__init__.py
+++ b/tests/mock_vws/utils/__init__.py
@@ -66,7 +66,7 @@ def __init__(
 
 def make_image_file(
     file_format: str,
-    color_space: Literal["L"] | Literal["RGB"] | Literal["CMYK"],
+    color_space: Literal["L", "RGB", "CMYK"],
     width: int,
     height: int,
 ) -> io.BytesIO: