diff --git a/dilib/specs.py b/dilib/specs.py
index 305dd6e..ae7c5a0 100644
--- a/dilib/specs.py
+++ b/dilib/specs.py
@@ -5,6 +5,7 @@
 in order for typing to work for the user, we have dummy functions
 that mimic expected typing behavior.
 """
+
 from __future__ import annotations
 
 from typing import Any, Callable, Generic, TypeVar, cast
diff --git a/dilib/tests/test_container.py b/dilib/tests/test_container.py
index c592104..d52a692 100644
--- a/dilib/tests/test_container.py
+++ b/dilib/tests/test_container.py
@@ -381,9 +381,9 @@ def test_typing() -> None:
     #     test_config.BasicConfig,
     # ] = dilib.get_container(config)
 
-    container: dilib.Container[
-        test_config.ParentConfig1
-    ] = dilib.get_container(config)
+    container: dilib.Container[test_config.ParentConfig1] = (
+        dilib.get_container(config)
+    )
 
     # Would trigger mypy error:
     # x: str = container.config.basic_config.x
diff --git a/dilib/tests/test_demo.py b/dilib/tests/test_demo.py
index 4947a1f..146fc2c 100644
--- a/dilib/tests/test_demo.py
+++ b/dilib/tests/test_demo.py
@@ -19,12 +19,10 @@ class Seat:
 class Engine(abc.ABC):
     @property
     @abc.abstractmethod
-    def started(self) -> bool:
-        ...
+    def started(self) -> bool: ...
 
     @abc.abstractmethod
-    def start(self) -> None:
-        ...
+    def start(self) -> None: ...
 
 
 class DBEngine(Engine, dilib.SingletonMixin):
diff --git a/dilib/tests/test_specs.py b/dilib/tests/test_specs.py
index f8a76eb..ae8305b 100644
--- a/dilib/tests/test_specs.py
+++ b/dilib/tests/test_specs.py
@@ -12,8 +12,7 @@
 
 class BaseMultiplier(abc.ABC):
     @abc.abstractmethod
-    def get_result(self) -> int:
-        ...
+    def get_result(self) -> int: ...
 
 
 class SimpleMultiplier(BaseMultiplier):
diff --git a/setup.cfg b/setup.cfg
index 62440ec..e8ef61e 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -47,7 +47,7 @@ test =
     pytest >= 6.2.5
     pytest-cov >=2, <3
     pyright >= 1.1.284
-    ruff >= 0.1.0
+    ruff >= 0.3.0
 
 [options.package_data]
 dilib = py.typed