diff --git a/src/commit_guardian/__init__.py b/src/commit_guardian/__init__.py
index 61d8083..18a159d 100644
--- a/src/commit_guardian/__init__.py
+++ b/src/commit_guardian/__init__.py
@@ -1,5 +1,6 @@
 __all__ = ["ping", "__version__"]
 __version__ = "0.1.0"
 
+
 def ping() -> str:
     return "pong"
diff --git a/src/commit_guardian/cli.py b/src/commit_guardian/cli.py
index 1841125..2e95176 100644
--- a/src/commit_guardian/cli.py
+++ b/src/commit_guardian/cli.py
@@ -1,8 +1,8 @@
 from __future__ import annotations
-import sys
 import click
 from . import __version__, ping
 
+
 @click.command()
 @click.option("--version", is_flag=True, help="Show version and exit.")
 def main(version: bool) -> None:
@@ -12,5 +12,6 @@ def main(version: bool) -> None:
     click.echo(ping())
     raise SystemExit(0)
 
+
 if __name__ == "__main__":
     main()
diff --git a/tests/test_sanity.py b/tests/test_sanity.py
index 3d243a5..1963bc1 100644
--- a/tests/test_sanity.py
+++ b/tests/test_sanity.py
@@ -1,4 +1,5 @@
 import commit_guardian as cg
 
+
 def test_ping() -> None:
     assert cg.ping() == "pong"