diff --git a/app/server.py b/app/server.py
index 713e1db..91e602a 100644
--- a/app/server.py
+++ b/app/server.py
@@ -23,10 +23,14 @@
     format="%(asctime)s %(levelname)s %(name)s %(message)s",
 )
 
+
 @asynccontextmanager
 async def lifespan(app: FastAPI):
     if not DATABASE_URL:
-        raise RuntimeError("DATABASE_URL is not set. Define it in the environment or .env file.")
+        raise RuntimeError(
+            "DATABASE_URL is not set. "
+            "Define it in the environment or .env file."
+        )
     try:
         app.state.pool = await asyncpg.create_pool(
             DATABASE_URL,
@@ -36,14 +40,19 @@ async def lifespan(app: FastAPI):
         logging.info("Connected to database successfully")
     except Exception as e:
         logging.error(f"Failed to connect to the database: {str(e)}")
-        raise RuntimeError("Failed to connect to the database. Check DATABASE_URL and DB availability.") from e
+        raise RuntimeError(
+            "Failed to connect to the database. "
+            "Check DATABASE_URL and DB availability."
+        ) from e
     FastAPICache.init(InMemoryBackend())
     yield
     await app.state.pool.close()
 
+
 app = FastAPI(lifespan=lifespan)
 app.add_middleware(GZipMiddleware, minimum_size=1000)
 
+
 async def get_db():
     async with app.state.pool.acquire() as conn:
         yield conn
@@ -53,8 +62,9 @@ async def get_db():
 async def index():
     return {"status": "It Works"}
 
+
 @app.get("/health")
-async def health(db = Depends(get_db)):
+async def health(db=Depends(get_db)):
     try:
         await db.execute("SELECT 1")
         return {"status": "ok", "db": "ok"}
@@ -100,7 +110,7 @@ async def generator():
 async def get_visits(
     begin: str = Query(..., description="Start date in ISO format"),
     end: str = Query(..., description="End date in ISO format"),
-    db = Depends(get_db)
+    db=Depends(get_db)
 ):
     begin = datetime.fromisoformat(begin)
     end = datetime.fromisoformat(end)
@@ -118,11 +128,12 @@ async def get_visits(
             detail="Internal server error occurred while fetching visits"
         )
 
+
 @app.get("/registrations")
 async def get_registrations(
     begin: str = Query(..., description="Start date in ISO format"),
     end: str = Query(..., description="End date in ISO format"),
-    db = Depends(get_db)
+    db=Depends(get_db)
 ):
     begin = datetime.fromisoformat(begin)
     end = datetime.fromisoformat(end)
diff --git a/ruff.toml b/ruff.toml
new file mode 100644
index 0000000..4677d44
--- /dev/null
+++ b/ruff.toml
@@ -0,0 +1,9 @@
+line-length = 80
+
+[lint.per-file-ignores]
+# init modules can contain the local imports, logic, unused imports
+"__init__.py" = ["F401"]
+
+[lint]
+preview = true
+select = ["E", "F", "C90"]
diff --git a/tests/test_server.py b/tests/test_server.py
index b517336..5678481 100644
--- a/tests/test_server.py
+++ b/tests/test_server.py
@@ -4,6 +4,7 @@
 
 PORT = os.getenv('PORT')
 
+
 def test_server():
     response = requests.get('http://localhost:4000/')
     assert response.status_code == 200
@@ -14,6 +15,10 @@ def test_server():
     assert response.json()[0] == {
         "datetime": "2023-03-01T10:36:22",
         "platform": "web",
-        "user_agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/117.0.0.0 Safari/537.36 Edg/117.0.2045.6",
+        "user_agent": (
+            "Mozilla/5.0 (Windows NT 10.0; Win64; x64) "
+            "AppleWebKit/537.36 (KHTML, like Gecko) "
+            "Chrome/117.0.0.0 Safari/537.36 Edg/117.0.2045.6"
+        ),
         "visit_id": "1de9ea66-70d3-4a1f-8735-df5ef7697fb9"
     }