diff --git a/Pipfile b/Pipfile
index 23b1370..3fbc6e4 100644
--- a/Pipfile
+++ b/Pipfile
@@ -14,6 +14,7 @@ pyyaml = "~=5.4.1"
 
 [dev-packages]
 flake8 = "~=3.9.2"
+yapf = "~=0.31.0"
 
 [requires]
 python_version = "3.8"
diff --git a/README.md b/README.md
index 7a38e97..f902575 100644
--- a/README.md
+++ b/README.md
@@ -43,6 +43,13 @@ python -m unittest discover ki
 flake8
 ```
 
+### Formatierung
+
+Um ein einheitliches Quellcode-Erlebnis zu haben, kann der Code mit yapf neu formatiert werden:
+
+'''
+yapf -i --recursive ki/
+'''
 
 ### Testbenutzer
 
diff --git a/ki/module.py b/ki/module.py
index da8bc46..79eeb96 100644
--- a/ki/module.py
+++ b/ki/module.py
@@ -1 +1 @@
-from ki import models, commands, routes # noqa
+from ki import models, commands, routes  # noqa
diff --git a/ki/test/test_skills_endpoint.py b/ki/test/test_skills_endpoint.py
index 0603102..80cfae6 100644
--- a/ki/test/test_skills_endpoint.py
+++ b/ki/test/test_skills_endpoint.py
@@ -22,13 +22,14 @@ class TestSkillsEndpoint(unittest.TestCase):
         self.assertEqual(response.status_code, 200)
         self.assertEqual(
             {
-                "skills": [
-                    {"id": 1, "name": "PHP"},
-                    {"id": 3, "name": "Python"}
-                ]
-            },
-            response.json
-        )
+                "skills": [{
+                    "id": 1,
+                    "name": "PHP"
+                }, {
+                    "id": 3,
+                    "name": "Python"
+                }]
+            }, response.json)
 
 
 if __name__ == "main":