diff --git a/src/deprecate/__init__.py b/src/deprecate/__init__.py
index f6653b7..b30387a 100644
--- a/src/deprecate/__init__.py
+++ b/src/deprecate/__init__.py
@@ -1,4 +1,5 @@
 """Deprecation package."""
+
 import os
 
 _PATH_PACKAGE = os.path.realpath(os.path.dirname(__file__))
diff --git a/src/deprecate/deprecation.py b/src/deprecate/deprecation.py
index 1d22492..1af7544 100644
--- a/src/deprecate/deprecation.py
+++ b/src/deprecate/deprecation.py
@@ -3,6 +3,7 @@
 Copyright (C) 2020-2023 Jiri Borovec <...>
 
 """
+
 import inspect
 from functools import partial, wraps
 from typing import Any, Callable, Dict, Optional, Union
diff --git a/src/deprecate/utils.py b/src/deprecate/utils.py
index c11ea06..36cf38f 100644
--- a/src/deprecate/utils.py
+++ b/src/deprecate/utils.py
@@ -3,6 +3,7 @@
 Copyright (C) 2020-2023 Jiri Borovec <...>
 
 """
+
 import inspect
 import warnings
 from contextlib import contextmanager
diff --git a/tests/collection_targets.py b/tests/collection_targets.py
index a2fc326..a460f40 100644
--- a/tests/collection_targets.py
+++ b/tests/collection_targets.py
@@ -1,4 +1,5 @@
 """Copyright (C) 2020-2023 Jiri Borovec <...>."""
+
 from typing import Any
 
 
diff --git a/tests/test_classes.py b/tests/test_classes.py
index 97e7fff..60e192c 100644
--- a/tests/test_classes.py
+++ b/tests/test_classes.py
@@ -1,4 +1,5 @@
 """Copyright (C) 2020-2023 Jiri Borovec <...>."""
+
 from functools import partial
 from typing import Any
 from warnings import warn
diff --git a/tests/test_functions.py b/tests/test_functions.py
index 5dded1e..5663dd7 100644
--- a/tests/test_functions.py
+++ b/tests/test_functions.py
@@ -1,4 +1,5 @@
 """Copyright (C) 2020-2023 Jiri Borovec <...>."""
+
 import pytest
 from deprecate.utils import no_warning_call