diff --git a/api/.flake8 b/api/.flake8
new file mode 100644
index 0000000..e4e4892
--- /dev/null
+++ b/api/.flake8
@@ -0,0 +1,4 @@
+[flake8]
+max-line-length = 80
+select = C,E,F,W,B,B950
+extend-ignore = E203, E501
diff --git a/api/advent22_api/dav_common.py b/api/advent22_api/dav_common.py
index 30714e5..7903fe5 100644
--- a/api/advent22_api/dav_common.py
+++ b/api/advent22_api/dav_common.py
@@ -6,22 +6,20 @@ from webdav3.client import Client as WebDAVclient
 
 from .settings import SETTINGS
 
-_WEBDAV_CLIENT = WebDAVclient({
-    "webdav_hostname":  SETTINGS.webdav.url,
-    "webdav_login":     SETTINGS.webdav.username,
-    "webdav_password":  SETTINGS.webdav.password,
-    "disable_check":    SETTINGS.webdav.disable_check,
-})
+_WEBDAV_CLIENT = WebDAVclient(
+    {
+        "webdav_hostname": SETTINGS.webdav.url,
+        "webdav_login": SETTINGS.webdav.username,
+        "webdav_password": SETTINGS.webdav.password,
+        "disable_check": SETTINGS.webdav.disable_check,
+    }
+)
 
 
 @AsyncTTL(time_to_live=SETTINGS.cache_ttl)
 async def dav_list_files(regex: re.Pattern, directory: str = "") -> list[str]:
     ls = _WEBDAV_CLIENT.list(directory)
-    return [
-        f"{directory}/{path}"
-        for path in ls
-        if regex.search(path)
-    ]
+    return [f"{directory}/{path}" for path in ls if regex.search(path)]
 
 
 @AsyncTTL(time_to_live=SETTINGS.cache_ttl)
diff --git a/api/advent22_api/routers/_image.py b/api/advent22_api/routers/_image.py
index f238321..94783c3 100644
--- a/api/advent22_api/routers/_image.py
+++ b/api/advent22_api/routers/_image.py
@@ -25,12 +25,14 @@ class AdventImage:
         square = min(width, height)
 
         # Bild zuschneiden und skalieren
-        img = img.crop(box=(
-            int((width - square)/2),
-            int((height - square)/2),
-            int((width + square)/2),
-            int((height + square)/2),
-        ))
+        img = img.crop(
+            box=(
+                int((width - square) / 2),
+                int((height - square) / 2),
+                int((width + square) / 2),
+                int((height + square) / 2),
+            )
+        )
 
         img = img.resize(
             size=(500, 500),
@@ -80,7 +82,7 @@ class AdventImage:
         """
 
         pixel_data = self.img.crop(box).getdata()
-        mean_color: np.ndarray = np.mean(pixel_data, axis=0)
+        mean_color: np.ndarray = np.mean(a=pixel_data, axis=0)
 
         return tuple(mean_color.astype(int).tolist())
 
@@ -99,11 +101,7 @@ class AdventImage:
 
         # betroffenen Bildbereich bestimmen
         text_box = await self.get_text_box(
-            xy=xy,
-            text=text,
-            font=font,
-            anchor=anchor,
-            **text_kwargs
+            xy=xy, text=text, font=font, anchor=anchor, **text_kwargs
         )
 
         if text_box is not None:
@@ -132,5 +130,5 @@ class AdventImage:
                 font=font,
                 fill=text_color,
                 anchor=anchor,
-                **text_kwargs
+                **text_kwargs,
             )
diff --git a/api/advent22_api/routers/_misc.py b/api/advent22_api/routers/_misc.py
index 8437969..97f6484 100644
--- a/api/advent22_api/routers/_misc.py
+++ b/api/advent22_api/routers/_misc.py
@@ -36,6 +36,7 @@ async def shuffle(seq: Sequence, rnd: random.Random | None = None) -> list:
     # Elemente mischen
     return rnd.sample(seq, len(seq))
 
+
 #########
 # IMAGE #
 #########
diff --git a/api/advent22_api/routers/abspacken.py b/api/advent22_api/routers/abspacken.py
index acb9fb4..84fbbdf 100644
--- a/api/advent22_api/routers/abspacken.py
+++ b/api/advent22_api/routers/abspacken.py
@@ -22,8 +22,10 @@ async def uwe(
 ) -> str:
     kurix = await get_kurix(kgs)
 
-    return f"UWE hat bei {firma} einen beachtlichen Haufen von " \
+    return (
+        f"UWE hat bei {firma} einen beachtlichen Haufen von "
         f"{kgs} Kg ({kurix:.3f} Kurix) auf den Läufer geschissen."
+    )
 
 
 @router.get("/torsten/{ding}")
@@ -41,8 +43,8 @@ async def torsten(ding: str) -> str:
         status.HTTP_418_IM_A_TEAPOT: {
             "description": "Commit Sudoku",
             "content": None,
-        }
-    }
+        },
+    },
 )
 async def kys() -> None:
     """
diff --git a/api/advent22_api/routers/user.py b/api/advent22_api/routers/user.py
index 0e4a466..d9f412a 100644
--- a/api/advent22_api/routers/user.py
+++ b/api/advent22_api/routers/user.py
@@ -13,9 +13,7 @@ async def user_is_admin(
     credentials: HTTPBasicCredentials = Depends(security),
     config: Config = Depends(get_config),
 ) -> bool:
-    username_correct = secrets.compare_digest(
-        credentials.username, config.admin.name
-    )
+    username_correct = secrets.compare_digest(credentials.username, config.admin.name)
 
     password_correct = secrets.compare_digest(
         credentials.password, config.admin.password