diff --git a/diracx-core/src/diracx/core/config/schema.py b/diracx-core/src/diracx/core/config/schema.py
index 29c1c514..84c24720 100644
--- a/diracx-core/src/diracx/core/config/schema.py
+++ b/diracx-core/src/diracx/core/config/schema.py
@@ -2,7 +2,7 @@
 
 import os
 from datetime import datetime
-from typing import Annotated, Any, Optional, TypeVar
+from typing import Annotated, Any, TypeVar
 
 from pydantic import BaseModel as _BaseModel
 from pydantic import ConfigDict, EmailStr, Field, PrivateAttr, model_validator
@@ -65,10 +65,10 @@ class GroupConfig(BaseModel):
     AutoUploadProxy: bool = False
     JobShare: int = 1000
     Properties: SerializableSet[SecurityProperty]
-    Quota: Optional[int] = None
+    Quota: int | None = None
     Users: SerializableSet[str]
     AllowBackgroundTQs: bool = False
-    VOMSRole: Optional[str] = None
+    VOMSRole: str | None = None
     AutoSyncVOMS: bool = False
 
 
diff --git a/diracx-core/src/diracx/core/properties.py b/diracx-core/src/diracx/core/properties.py
index 3a80b879..c75c014e 100644
--- a/diracx-core/src/diracx/core/properties.py
+++ b/diracx-core/src/diracx/core/properties.py
@@ -6,7 +6,8 @@
 
 import inspect
 import operator
-from typing import Any, Callable
+from collections.abc import Callable
+from typing import Any
 
 from pydantic import GetCoreSchemaHandler
 from pydantic_core import CoreSchema, core_schema
diff --git a/diracx-core/src/diracx/core/settings.py b/diracx-core/src/diracx/core/settings.py
index 936dad05..3ee37df8 100644
--- a/diracx-core/src/diracx/core/settings.py
+++ b/diracx-core/src/diracx/core/settings.py
@@ -7,8 +7,9 @@
 )
 
 import contextlib
+from collections.abc import AsyncIterator
 from pathlib import Path
-from typing import Annotated, Any, AsyncIterator, Self, TypeVar
+from typing import Annotated, Any, Self, TypeVar
 
 from authlib.jose import JsonWebKey
 from cryptography.fernet import Fernet
diff --git a/diracx-db/src/diracx/db/os/utils.py b/diracx-db/src/diracx/db/os/utils.py
index 1033a944..659c20bd 100644
--- a/diracx-db/src/diracx/db/os/utils.py
+++ b/diracx-db/src/diracx/db/os/utils.py
@@ -7,9 +7,10 @@
 import logging
 import os
 from abc import ABCMeta, abstractmethod
+from collections.abc import AsyncIterator
 from contextvars import ContextVar
 from datetime import datetime
-from typing import Any, AsyncIterator, Self
+from typing import Any, Self
 
 from opensearchpy import AsyncOpenSearch
 
diff --git a/diracx-db/src/diracx/db/sql/jobs/db.py b/diracx-db/src/diracx/db/sql/jobs/db.py
index 38938ddb..36ba6cc1 100644
--- a/diracx-db/src/diracx/db/sql/jobs/db.py
+++ b/diracx-db/src/diracx/db/sql/jobs/db.py
@@ -503,9 +503,7 @@ async def set_properties(
 
         """
         # Check that all we always update the same set of properties
-        required_parameters_set = set(
-            [tuple(sorted(k.keys())) for k in properties.values()]
-        )
+        required_parameters_set = {tuple(sorted(k.keys())) for k in properties.values()}
 
         if len(required_parameters_set) != 1:
             raise NotImplementedError(
@@ -682,10 +680,10 @@ async def get_tq_infos_for_jobs(
             .join(JobsQueue, TaskQueues.TQId == JobsQueue.TQId)
             .where(JobsQueue.JobId.in_(job_ids))
         )
-        return set(
+        return {
             (int(row[0]), str(row[1]), str(row[2]), str(row[3]))
             for row in (await self.conn.execute(stmt)).all()
-        )
+        }
 
     async def get_owner_for_task_queue(self, tq_id: int) -> dict[str, str]:
         """Get the owner and owner group for a task queue."""
diff --git a/diracx-db/src/diracx/db/sql/utils.py b/diracx-db/src/diracx/db/sql/utils.py
index 9dba7b8a..6c16e385 100644
--- a/diracx-db/src/diracx/db/sql/utils.py
+++ b/diracx-db/src/diracx/db/sql/utils.py
@@ -6,10 +6,11 @@
 import logging
 import os
 from abc import ABCMeta
+from collections.abc import AsyncIterator
 from contextvars import ContextVar
 from datetime import datetime, timedelta, timezone
 from functools import partial
-from typing import TYPE_CHECKING, AsyncIterator, Self, cast
+from typing import TYPE_CHECKING, Self, cast
 
 from pydantic import TypeAdapter
 from sqlalchemy import Column as RawColumn
diff --git a/diracx-routers/src/diracx/routers/__init__.py b/diracx-routers/src/diracx/routers/__init__.py
index 2ff15cde..26a83263 100644
--- a/diracx-routers/src/diracx/routers/__init__.py
+++ b/diracx-routers/src/diracx/routers/__init__.py
@@ -10,10 +10,10 @@
 import inspect
 import logging
 import os
-from collections.abc import AsyncGenerator
+from collections.abc import AsyncGenerator, Awaitable, Callable, Iterable, Sequence
 from functools import partial
 from logging import Formatter, StreamHandler
-from typing import Any, Awaitable, Callable, Iterable, Sequence, TypeVar, cast
+from typing import Any, TypeVar, cast
 
 import dotenv
 from cachetools import TTLCache
@@ -346,12 +346,10 @@ def create_app() -> DiracFastAPI:
 
     # Find all the access policies
 
-    available_access_policy_names = set(
-        [
-            entry_point.name
-            for entry_point in select_from_extension(group="diracx.access_policies")
-        ]
-    )
+    available_access_policy_names = {
+        entry_point.name
+        for entry_point in select_from_extension(group="diracx.access_policies")
+    }
 
     all_access_policies = {}
 
@@ -428,7 +426,7 @@ async def is_db_unavailable(db: BaseSQLDB | BaseOSDB) -> str:
     return _db_alive_cache[db]
 
 
-async def db_transaction(db: T2) -> AsyncGenerator[T2, None]:
+async def db_transaction(db: T2) -> AsyncGenerator[T2]:
     """Initiate a DB transaction."""
     # Entering the context already triggers a connection to the DB
     # that may fail
diff --git a/diracx-routers/src/diracx/routers/access_policies.py b/diracx-routers/src/diracx/routers/access_policies.py
index cb4d5a7f..b7605fe7 100644
--- a/diracx-routers/src/diracx/routers/access_policies.py
+++ b/diracx-routers/src/diracx/routers/access_policies.py
@@ -21,7 +21,8 @@
 import os
 import time
 from abc import ABCMeta, abstractmethod
-from typing import Annotated, Callable, Self
+from collections.abc import Callable
+from typing import Annotated, Self
 
 from fastapi import Depends
 
diff --git a/diracx-routers/src/diracx/routers/job_manager/access_policies.py b/diracx-routers/src/diracx/routers/job_manager/access_policies.py
index 40d6a75b..68ff4a91 100644
--- a/diracx-routers/src/diracx/routers/job_manager/access_policies.py
+++ b/diracx-routers/src/diracx/routers/job_manager/access_policies.py
@@ -1,7 +1,8 @@
 from __future__ import annotations
 
+from collections.abc import Callable
 from enum import StrEnum, auto
-from typing import Annotated, Callable
+from typing import Annotated
 
 from fastapi import Depends, HTTPException, status
 
diff --git a/diracx-routers/src/diracx/routers/job_manager/sandboxes.py b/diracx-routers/src/diracx/routers/job_manager/sandboxes.py
index 6e62379c..43f3545e 100644
--- a/diracx-routers/src/diracx/routers/job_manager/sandboxes.py
+++ b/diracx-routers/src/diracx/routers/job_manager/sandboxes.py
@@ -1,8 +1,9 @@
 from __future__ import annotations
 
 import contextlib
+from collections.abc import AsyncIterator
 from http import HTTPStatus
-from typing import TYPE_CHECKING, Annotated, AsyncIterator, Literal
+from typing import TYPE_CHECKING, Annotated, Literal
 
 from aiobotocore.session import get_session
 from botocore.config import Config