diff --git a/app.py b/app.py
index a74cb5d..3ee3354 100644
--- a/app.py
+++ b/app.py
@@ -1,8 +1,8 @@
 from __future__ import annotations
 
+import logging
 from dataclasses import replace
 from datetime import datetime, time, timedelta
-import logging
 from zoneinfo import ZoneInfo
 
 import folium
diff --git a/pyproject.toml b/pyproject.toml
index 93d06f1..4badaaf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,7 +23,7 @@ dependencies = [
 [project.optional-dependencies]
 dev = [
   "pytest>=8.0,<10.0",
-  "ruff>=0.11,<0.16",
+  "ruff>=0.11,<0.17",
   "pyright>=1.1.0,<2.0",
 ]
 
diff --git a/src/geocoding.py b/src/geocoding.py
index 041da88..3abf1cc 100644
--- a/src/geocoding.py
+++ b/src/geocoding.py
@@ -3,7 +3,6 @@
 import logging
 from typing import Protocol
 
-
 from src.cache import RateLimiter, TTLCache
 from src.config import Settings
 from src.http_client import build_http_session
diff --git a/src/http_client.py b/src/http_client.py
index dc6b251..6f96ede 100644
--- a/src/http_client.py
+++ b/src/http_client.py
@@ -1,7 +1,7 @@
 from __future__ import annotations
 
-from typing import Any
 import ssl
+from typing import Any
 
 import requests
 from requests.adapters import HTTPAdapter
diff --git a/src/mapview.py b/src/mapview.py
index 173e3d5..a8dc69a 100644
--- a/src/mapview.py
+++ b/src/mapview.py
@@ -1,8 +1,9 @@
 from __future__ import annotations
 
+from typing import cast
+
 import folium
 from branca.element import Element, Figure
-from typing import cast
 
 from src.i18n import t
 from src.models import (
diff --git a/src/routing.py b/src/routing.py
index 7715904..484d323 100644
--- a/src/routing.py
+++ b/src/routing.py
@@ -1,11 +1,10 @@
 from __future__ import annotations
 
-from dataclasses import replace
 import logging
 import math
+from dataclasses import replace
 from typing import Protocol
 
-
 from src.cache import RateLimiter, TTLCache
 from src.config import Settings
 from src.http_client import build_http_session
diff --git a/src/scoring.py b/src/scoring.py
index da24a99..62bbbe9 100644
--- a/src/scoring.py
+++ b/src/scoring.py
@@ -1,9 +1,9 @@
 from __future__ import annotations
 
-from datetime import datetime, timedelta
 import logging
 import math
-from typing import Callable
+from collections.abc import Callable
+from datetime import datetime, timedelta
 
 from src.i18n import t
 from src.models import (
diff --git a/src/utils.py b/src/utils.py
index ce8f297..5b4aef6 100644
--- a/src/utils.py
+++ b/src/utils.py
@@ -85,7 +85,7 @@ def format_distance_km(distance_m: float) -> str:
 
 
 def format_duration_minutes(duration_s: float) -> str:
-    total_minutes = int(round(duration_s / 60.0))
+    total_minutes = round(duration_s / 60.0)
     hours, minutes = divmod(total_minutes, 60)
     if hours:
         return f"{hours}h {minutes}m"
diff --git a/tests/test_providers.py b/tests/test_providers.py
index 3a654d2..eea3849 100644
--- a/tests/test_providers.py
+++ b/tests/test_providers.py
@@ -1,7 +1,7 @@
 from dataclasses import dataclass
 
-from src.http_client import SystemSSLContextAdapter
 from src.geocoding import NominatimGeocoder
+from src.http_client import SystemSSLContextAdapter
 from src.models import Coordinates
 from src.routing import OSRMRouter
 
diff --git a/tests/test_repo_readiness.py b/tests/test_repo_readiness.py
index 18b7007..63a9282 100644
--- a/tests/test_repo_readiness.py
+++ b/tests/test_repo_readiness.py
@@ -1,7 +1,7 @@
 from __future__ import annotations
 
-from pathlib import Path
 import shutil
+from pathlib import Path
 
 from src import config
 
@@ -17,12 +17,10 @@ def test_load_settings_reads_values_from_project_dotenv(monkeypatch) -> None:
     monkeypatch.delenv("SUNROUTER_ROUTER_BASE_URL", raising=False)
     monkeypatch.delenv("SUNROUTER_MAX_ALTERNATIVES", raising=False)
     Path(".env").write_text(
-        "\n".join(
-            [
-                "SUNROUTER_DEFAULT_TIMEZONE=UTC",
-                "SUNROUTER_ROUTER_BASE_URL=https://example.test/route/v1",
-                "SUNROUTER_MAX_ALTERNATIVES=5",
-            ]
+        (
+            "SUNROUTER_DEFAULT_TIMEZONE=UTC\n"
+            "SUNROUTER_ROUTER_BASE_URL=https://example.test/route/v1\n"
+            "SUNROUTER_MAX_ALTERNATIVES=5"
         ),
         encoding="utf-8",
     )