diff --git a/tests/test_app.py b/tests/test_app.py
index c683353..1e401cc 100644
--- a/tests/test_app.py
+++ b/tests/test_app.py
@@ -1,3 +1,2 @@
-
 def test_app(app):
     assert app
diff --git a/teufa/cli.py b/teufa/cli.py
index 45e668a..6bc2fd0 100644
--- a/teufa/cli.py
+++ b/teufa/cli.py
@@ -1,4 +1,5 @@
 import click
+
 import teufa.server
 
 
diff --git a/teufa/server.py b/teufa/server.py
index 54f461e..31d9758 100644
--- a/teufa/server.py
+++ b/teufa/server.py
@@ -4,7 +4,6 @@ from .app import create_app
 
 
 class Application(gunicorn.app.base.BaseApplication):
-
     def __init__(self, options=None):
         self.options = options or {}
         super().__init__()