diff --git a/_build_backend.py b/_build_backend.py
index 6bbbff45d..67e11cae5 100644
--- a/_build_backend.py
+++ b/_build_backend.py
@@ -1,4 +1,5 @@
 """Build backend that also compiles translations and frontend."""
+
 # pylint: disable=wildcard-import,function-redefined,unused-wildcard-import
 
 from __future__ import annotations
diff --git a/contrib/pythonanywhere/fava/fava_pythonanywhere_com_wsgi.py b/contrib/pythonanywhere/fava/fava_pythonanywhere_com_wsgi.py
index e98e19561..7d371ba12 100644
--- a/contrib/pythonanywhere/fava/fava_pythonanywhere_com_wsgi.py
+++ b/contrib/pythonanywhere/fava/fava_pythonanywhere_com_wsgi.py
@@ -1,4 +1,5 @@
 """fava wsgi application"""
+
 from __future__ import annotations
 
 from fava.application import create_app
diff --git a/contrib/pythonanywhere/favadev/favadev_pythonanywhere_com_wsgi.py b/contrib/pythonanywhere/favadev/favadev_pythonanywhere_com_wsgi.py
index df4ba476c..bccb391c8 100644
--- a/contrib/pythonanywhere/favadev/favadev_pythonanywhere_com_wsgi.py
+++ b/contrib/pythonanywhere/favadev/favadev_pythonanywhere_com_wsgi.py
@@ -1,4 +1,5 @@
 """fava wsgi application"""
+
 from __future__ import annotations
 
 from fava.application import create_app
diff --git a/docs/generate.py b/docs/generate.py
index 76ea2bc3b..4e57acde0 100644
--- a/docs/generate.py
+++ b/docs/generate.py
@@ -2,6 +2,7 @@
 
 sphinx-apidoc is not customizeable enough to do this.
 """
+
 from __future__ import annotations
 
 import pkgutil
diff --git a/src/fava/__init__.py b/src/fava/__init__.py
index 2a6fdb4bc..9e5e4e675 100644
--- a/src/fava/__init__.py
+++ b/src/fava/__init__.py
@@ -1,4 +1,5 @@
 """Fava - A web interface for Beancount."""
+
 from __future__ import annotations
 
 from contextlib import suppress
diff --git a/src/fava/application.py b/src/fava/application.py
index 5bd1a2669..6fb06bfbf 100644
--- a/src/fava/application.py
+++ b/src/fava/application.py
@@ -9,6 +9,7 @@
     app.run('localhost', 5000)
 
 """
+
 from __future__ import annotations
 
 import logging
diff --git a/src/fava/beans/abc.py b/src/fava/beans/abc.py
index 8633c855b..fce957285 100644
--- a/src/fava/beans/abc.py
+++ b/src/fava/beans/abc.py
@@ -1,4 +1,5 @@
 """Abstract base classes for Beancount types."""
+
 from __future__ import annotations
 
 from abc import ABC
diff --git a/src/fava/beans/account.py b/src/fava/beans/account.py
index b787bf0d6..5a6c67e7a 100644
--- a/src/fava/beans/account.py
+++ b/src/fava/beans/account.py
@@ -1,4 +1,5 @@
 """Account name helpers."""
+
 from __future__ import annotations
 
 from typing import TYPE_CHECKING
diff --git a/src/fava/beans/create.py b/src/fava/beans/create.py
index 73543dfc3..52379b7a7 100644
--- a/src/fava/beans/create.py
+++ b/src/fava/beans/create.py
@@ -1,6 +1,5 @@
 """Helpers to create entries."""
 
-
 from __future__ import annotations
 
 from decimal import Decimal
diff --git a/src/fava/beans/flags.py b/src/fava/beans/flags.py
index 76a57bb65..7250331d8 100644
--- a/src/fava/beans/flags.py
+++ b/src/fava/beans/flags.py
@@ -1,4 +1,5 @@
 """Beancount entry flags."""
+
 from __future__ import annotations
 
 from typing import TYPE_CHECKING
diff --git a/src/fava/beans/funcs.py b/src/fava/beans/funcs.py
index 3cb9f7544..d51824a23 100644
--- a/src/fava/beans/funcs.py
+++ b/src/fava/beans/funcs.py
@@ -1,4 +1,5 @@
 """Various functions to deal with Beancount data."""
+
 from __future__ import annotations
 
 from typing import Any
diff --git a/src/fava/beans/helpers.py b/src/fava/beans/helpers.py
index 84f824816..ba6b5fbd2 100644
--- a/src/fava/beans/helpers.py
+++ b/src/fava/beans/helpers.py
@@ -1,4 +1,5 @@
 """Helpers for Beancount entries."""
+
 from __future__ import annotations
 
 from typing import Any
diff --git a/src/fava/beans/load.py b/src/fava/beans/load.py
index 8e4ce9cd0..ddc41af5f 100644
--- a/src/fava/beans/load.py
+++ b/src/fava/beans/load.py
@@ -1,4 +1,5 @@
 """Load Beancount files and strings."""
+
 from __future__ import annotations
 
 from typing import TYPE_CHECKING
diff --git a/src/fava/beans/prices.py b/src/fava/beans/prices.py
index 4b16ac91b..e4de9d297 100644
--- a/src/fava/beans/prices.py
+++ b/src/fava/beans/prices.py
@@ -1,4 +1,5 @@
 """Price helpers."""
+
 from __future__ import annotations
 
 import datetime
diff --git a/src/fava/beans/str.py b/src/fava/beans/str.py
index 499ba5124..37e6a069f 100644
--- a/src/fava/beans/str.py
+++ b/src/fava/beans/str.py
@@ -1,4 +1,5 @@
 """Convert Beancount types to string."""
+
 from __future__ import annotations
 
 from decimal import Decimal
diff --git a/src/fava/beans/types.py b/src/fava/beans/types.py
index 6421465f4..874dad931 100644
--- a/src/fava/beans/types.py
+++ b/src/fava/beans/types.py
@@ -1,4 +1,5 @@
 """Typing helpers."""
+
 from __future__ import annotations
 
 from typing import TYPE_CHECKING
diff --git a/src/fava/cli.py b/src/fava/cli.py
index 601272bcf..43511f844 100644
--- a/src/fava/cli.py
+++ b/src/fava/cli.py
@@ -1,4 +1,5 @@
 """The command-line interface for Fava."""
+
 from __future__ import annotations
 
 import errno
diff --git a/src/fava/context.py b/src/fava/context.py
index 11d95c69e..2b82aebac 100644
--- a/src/fava/context.py
+++ b/src/fava/context.py
@@ -1,4 +1,5 @@
 """Specify types for the flask application context."""
+
 from __future__ import annotations
 
 from typing import TYPE_CHECKING
diff --git a/src/fava/core/__init__.py b/src/fava/core/__init__.py
index c90c96daf..6d5c79f06 100644
--- a/src/fava/core/__init__.py
+++ b/src/fava/core/__init__.py
@@ -1,4 +1,5 @@
 """This module provides the data required by Fava's reports."""
+
 from __future__ import annotations
 
 from datetime import date
diff --git a/src/fava/core/accounts.py b/src/fava/core/accounts.py
index 6f81298f3..c9b394d7b 100644
--- a/src/fava/core/accounts.py
+++ b/src/fava/core/accounts.py
@@ -1,4 +1,5 @@
 """Account close date and metadata."""
+
 from __future__ import annotations
 
 import datetime
diff --git a/src/fava/core/attributes.py b/src/fava/core/attributes.py
index 3c44d60bf..6ab70de46 100644
--- a/src/fava/core/attributes.py
+++ b/src/fava/core/attributes.py
@@ -1,4 +1,5 @@
 """Attributes for auto-completion."""
+
 from __future__ import annotations
 
 from typing import TYPE_CHECKING
diff --git a/src/fava/core/budgets.py b/src/fava/core/budgets.py
index 2b1bbd139..1b5ba1498 100644
--- a/src/fava/core/budgets.py
+++ b/src/fava/core/budgets.py
@@ -1,4 +1,5 @@
 """Parsing and computing budgets."""
+
 from __future__ import annotations
 
 from collections import Counter
diff --git a/src/fava/core/charts.py b/src/fava/core/charts.py
index 214d048cd..b5029393f 100644
--- a/src/fava/core/charts.py
+++ b/src/fava/core/charts.py
@@ -1,4 +1,5 @@
 """Provide data suitable for Fava's charts."""
+
 from __future__ import annotations
 
 from collections import defaultdict
diff --git a/src/fava/core/commodities.py b/src/fava/core/commodities.py
index 93e5d46df..a3dbd91d3 100644
--- a/src/fava/core/commodities.py
+++ b/src/fava/core/commodities.py
@@ -1,4 +1,5 @@
 """Attributes for auto-completion."""
+
 from __future__ import annotations
 
 from contextlib import suppress
diff --git a/src/fava/core/conversion.py b/src/fava/core/conversion.py
index 5395141c6..4f24a990b 100644
--- a/src/fava/core/conversion.py
+++ b/src/fava/core/conversion.py
@@ -2,6 +2,7 @@
 
 All functions in this module will be automatically added as template filters.
 """
+
 from __future__ import annotations
 
 from typing import TYPE_CHECKING
diff --git a/src/fava/core/documents.py b/src/fava/core/documents.py
index 0eb32cf7b..aa505dedb 100644
--- a/src/fava/core/documents.py
+++ b/src/fava/core/documents.py
@@ -1,4 +1,5 @@
 """Document path related helpers."""
+
 from __future__ import annotations
 
 from os import altsep
diff --git a/src/fava/core/extensions.py b/src/fava/core/extensions.py
index 49f564de0..8a593ac01 100644
--- a/src/fava/core/extensions.py
+++ b/src/fava/core/extensions.py
@@ -1,4 +1,5 @@
 """Fava extensions."""
+
 from __future__ import annotations
 
 from dataclasses import dataclass
diff --git a/src/fava/core/fava_options.py b/src/fava/core/fava_options.py
index 4434320b7..134bcf1d2 100644
--- a/src/fava/core/fava_options.py
+++ b/src/fava/core/fava_options.py
@@ -5,6 +5,7 @@
 parsing the options.
 
 """
+
 from __future__ import annotations
 
 import re
diff --git a/src/fava/core/file.py b/src/fava/core/file.py
index 65d70ef2e..fae317492 100644
--- a/src/fava/core/file.py
+++ b/src/fava/core/file.py
@@ -1,4 +1,5 @@
 """Reading/writing Beancount files."""
+
 from __future__ import annotations
 
 import re
diff --git a/src/fava/core/filters.py b/src/fava/core/filters.py
index df829f588..b918ea69e 100644
--- a/src/fava/core/filters.py
+++ b/src/fava/core/filters.py
@@ -1,4 +1,5 @@
 """Entry filters."""
+
 from __future__ import annotations
 
 import re
diff --git a/src/fava/core/group_entries.py b/src/fava/core/group_entries.py
index 148279fcc..d53d0f112 100644
--- a/src/fava/core/group_entries.py
+++ b/src/fava/core/group_entries.py
@@ -1,4 +1,5 @@
 """Entries grouped by type."""
+
 from __future__ import annotations
 
 from collections import defaultdict
diff --git a/src/fava/core/ingest.py b/src/fava/core/ingest.py
index 67a838009..504e40f62 100644
--- a/src/fava/core/ingest.py
+++ b/src/fava/core/ingest.py
@@ -1,4 +1,5 @@
 """Ingest helper functions."""
+
 from __future__ import annotations
 
 import datetime
diff --git a/src/fava/core/inventory.py b/src/fava/core/inventory.py
index 7fb952062..8b8678105 100644
--- a/src/fava/core/inventory.py
+++ b/src/fava/core/inventory.py
@@ -1,4 +1,5 @@
 """Alternative implementation of Beancount's Inventory."""
+
 from __future__ import annotations
 
 from decimal import Decimal
diff --git a/src/fava/core/misc.py b/src/fava/core/misc.py
index e5f2bf330..df475885c 100644
--- a/src/fava/core/misc.py
+++ b/src/fava/core/misc.py
@@ -1,4 +1,5 @@
 """Some miscellaneous reports."""
+
 from __future__ import annotations
 
 import datetime
diff --git a/src/fava/core/module_base.py b/src/fava/core/module_base.py
index 2c7a97169..0b69302a8 100644
--- a/src/fava/core/module_base.py
+++ b/src/fava/core/module_base.py
@@ -1,4 +1,5 @@
 """Base class for the "modules" of FavaLedger."""
+
 from __future__ import annotations
 
 from typing import TYPE_CHECKING
diff --git a/src/fava/core/number.py b/src/fava/core/number.py
index ad0f0b1b2..ff461b6c0 100644
--- a/src/fava/core/number.py
+++ b/src/fava/core/number.py
@@ -1,4 +1,5 @@
 """Formatting numbers."""
+
 from __future__ import annotations
 
 import copy
diff --git a/src/fava/core/query_shell.py b/src/fava/core/query_shell.py
index 8038c7c57..7f42708ca 100644
--- a/src/fava/core/query_shell.py
+++ b/src/fava/core/query_shell.py
@@ -1,4 +1,5 @@
 """For using the Beancount shell from Fava."""
+
 from __future__ import annotations
 
 import contextlib
diff --git a/src/fava/core/tree.py b/src/fava/core/tree.py
index a30c46bbb..1efc108f0 100644
--- a/src/fava/core/tree.py
+++ b/src/fava/core/tree.py
@@ -1,4 +1,5 @@
 """Account balance trees."""
+
 from __future__ import annotations
 
 from collections import defaultdict
diff --git a/src/fava/core/watcher.py b/src/fava/core/watcher.py
index 1b32953ed..2c7663366 100644
--- a/src/fava/core/watcher.py
+++ b/src/fava/core/watcher.py
@@ -1,4 +1,5 @@
 """A simple file and folder watcher."""
+
 from __future__ import annotations
 
 from os import walk
diff --git a/src/fava/ext/__init__.py b/src/fava/ext/__init__.py
index 45058cce7..3f83c689d 100644
--- a/src/fava/ext/__init__.py
+++ b/src/fava/ext/__init__.py
@@ -1,4 +1,5 @@
 """Fava's extension system."""
+
 from __future__ import annotations
 
 import ast
@@ -158,9 +159,9 @@ def find_extensions(
 
 
 def extension_endpoint(
-    func_or_endpoint_name: Callable[[FavaExtensionBase], Any]
-    | str
-    | None = None,
+    func_or_endpoint_name: (
+        Callable[[FavaExtensionBase], Any] | str | None
+    ) = None,
     methods: list[str] | None = None,
 ) -> (
     Callable[[FavaExtensionBase], Response]
diff --git a/src/fava/ext/auto_commit.py b/src/fava/ext/auto_commit.py
index 047ca0a79..aae0c25ce 100644
--- a/src/fava/ext/auto_commit.py
+++ b/src/fava/ext/auto_commit.py
@@ -3,6 +3,7 @@
 This mainly serves as an example how Fava's extension systems, which only
 really does hooks at the moment, works.
 """
+
 from __future__ import annotations
 
 from pathlib import Path
diff --git a/src/fava/ext/portfolio_list/__init__.py b/src/fava/ext/portfolio_list/__init__.py
index 81dfc3b85..04af96ece 100644
--- a/src/fava/ext/portfolio_list/__init__.py
+++ b/src/fava/ext/portfolio_list/__init__.py
@@ -2,6 +2,7 @@
 
 This is a simple example of Fava's extension reports system.
 """
+
 from __future__ import annotations
 
 import re
diff --git a/src/fava/help/__init__.py b/src/fava/help/__init__.py
index 5b4897c80..d7396c2cd 100644
--- a/src/fava/help/__init__.py
+++ b/src/fava/help/__init__.py
@@ -1,4 +1,5 @@
 """List of all available help pages."""
+
 from __future__ import annotations
 
 HELP_PAGES = {
diff --git a/src/fava/helpers.py b/src/fava/helpers.py
index 04baa8d30..2365902ed 100644
--- a/src/fava/helpers.py
+++ b/src/fava/helpers.py
@@ -1,4 +1,5 @@
 """Exceptions and module base class."""
+
 from __future__ import annotations
 
 from typing import NamedTuple
diff --git a/src/fava/internal_api.py b/src/fava/internal_api.py
index ae50ff001..f7fd9bf94 100644
--- a/src/fava/internal_api.py
+++ b/src/fava/internal_api.py
@@ -4,6 +4,7 @@
 this part of the functionality to be tested and allowing some end-to-end tests
 for the frontend data validation.
 """
+
 from __future__ import annotations
 
 from copy import copy
diff --git a/src/fava/json_api.py b/src/fava/json_api.py
index df7d7fee1..ddc51f4da 100644
--- a/src/fava/json_api.py
+++ b/src/fava/json_api.py
@@ -3,6 +3,7 @@
 This module contains the url endpoints of the JSON API that is used by the web
 interface for asynchronous functionality.
 """
+
 from __future__ import annotations
 
 import shutil
diff --git a/src/fava/plugins/__init__.py b/src/fava/plugins/__init__.py
index ea71cdd0b..5076461bb 100644
--- a/src/fava/plugins/__init__.py
+++ b/src/fava/plugins/__init__.py
@@ -1,2 +1,3 @@
 """Some Beancount plugins."""
+
 from __future__ import annotations
diff --git a/src/fava/plugins/link_documents.py b/src/fava/plugins/link_documents.py
index 301dafcd8..a7c2a4f2b 100644
--- a/src/fava/plugins/link_documents.py
+++ b/src/fava/plugins/link_documents.py
@@ -4,6 +4,7 @@
 associate them to Document entries. For transactions, it then also adds a link
 from the transaction to documents, as well as the "#linked" tag.
 """
+
 from __future__ import annotations
 
 from collections import defaultdict
diff --git a/src/fava/plugins/tag_discovered_documents.py b/src/fava/plugins/tag_discovered_documents.py
index f115ae142..d98bf1d05 100644
--- a/src/fava/plugins/tag_discovered_documents.py
+++ b/src/fava/plugins/tag_discovered_documents.py
@@ -3,6 +3,7 @@
 It looks through all Document entries that were added by Beancount
 automatically through file discovery and adds the tag "#discovered".
 """
+
 from __future__ import annotations
 
 from typing import TYPE_CHECKING
diff --git a/src/fava/serialisation.py b/src/fava/serialisation.py
index ee04882f4..8a2e18b78 100644
--- a/src/fava/serialisation.py
+++ b/src/fava/serialisation.py
@@ -7,6 +7,7 @@
 
 This is not intended to work well enough for full roundtrips yet.
 """
+
 from __future__ import annotations
 
 import datetime
diff --git a/src/fava/template_filters.py b/src/fava/template_filters.py
index 274cf2634..cf560ba42 100644
--- a/src/fava/template_filters.py
+++ b/src/fava/template_filters.py
@@ -2,6 +2,7 @@
 
 All functions in this module will be automatically added as template filters.
 """
+
 from __future__ import annotations
 
 from decimal import Decimal
diff --git a/src/fava/util/__init__.py b/src/fava/util/__init__.py
index 11e3f34cf..d88cf78a4 100644
--- a/src/fava/util/__init__.py
+++ b/src/fava/util/__init__.py
@@ -1,4 +1,5 @@
 """Some small utility functions."""
+
 from __future__ import annotations
 
 import logging
diff --git a/src/fava/util/date.py b/src/fava/util/date.py
index fc3380d7f..b2fbdd8c6 100644
--- a/src/fava/util/date.py
+++ b/src/fava/util/date.py
@@ -4,6 +4,7 @@
     Date ranges are always tuples (start, end) from the (inclusive) start date
     to the (exclusive) end date.
 """
+
 from __future__ import annotations
 
 import datetime
diff --git a/src/fava/util/excel.py b/src/fava/util/excel.py
index e44db383e..6f393f32f 100644
--- a/src/fava/util/excel.py
+++ b/src/fava/util/excel.py
@@ -1,4 +1,5 @@
 """Writing query results to CSV and spreadsheet documents."""
+
 from __future__ import annotations
 
 import csv
diff --git a/src/fava/util/ranking.py b/src/fava/util/ranking.py
index a3b2689e0..3a0a85e26 100644
--- a/src/fava/util/ranking.py
+++ b/src/fava/util/ranking.py
@@ -1,4 +1,5 @@
 """Ranking utilities."""
+
 from __future__ import annotations
 
 import math
diff --git a/src/fava/util/sets.py b/src/fava/util/sets.py
index d49fcb4a5..3def2a4fd 100644
--- a/src/fava/util/sets.py
+++ b/src/fava/util/sets.py
@@ -1,4 +1,5 @@
 """Utils for Python sets."""
+
 from __future__ import annotations
 
 from typing import AbstractSet
diff --git a/tests/conftest.py b/tests/conftest.py
index f9a69e30f..358b2468c 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1,4 +1,5 @@
 """Test fixtures."""
+
 # pylint: disable=redefined-outer-name
 from __future__ import annotations
 
diff --git a/tests/data/import_config.py b/tests/data/import_config.py
index 68164d108..6fde669c0 100644
--- a/tests/data/import_config.py
+++ b/tests/data/import_config.py
@@ -1,4 +1,5 @@
 """Test importer for Fava."""
+
 from __future__ import annotations
 
 import csv
diff --git a/tests/test_application.py b/tests/test_application.py
index 677ca671d..8ce29ab88 100644
--- a/tests/test_application.py
+++ b/tests/test_application.py
@@ -1,4 +1,5 @@
 """Tests for Fava's main Flask app."""
+
 from __future__ import annotations
 
 from typing import TYPE_CHECKING
diff --git a/tests/test_core_budgets.py b/tests/test_core_budgets.py
index 26b04f290..8a4e7fa02 100644
--- a/tests/test_core_budgets.py
+++ b/tests/test_core_budgets.py
@@ -1,4 +1,5 @@
 """Fava's budget syntax."""
+
 from __future__ import annotations
 
 from datetime import date
diff --git a/tests/test_extensions.py b/tests/test_extensions.py
index 5cc2fc0b8..fb1b40b59 100644
--- a/tests/test_extensions.py
+++ b/tests/test_extensions.py
@@ -1,4 +1,5 @@
 """Tests for the extension system."""
+
 from __future__ import annotations
 
 from typing import TYPE_CHECKING
diff --git a/tests/test_internal_api.py b/tests/test_internal_api.py
index 76df4e4b8..641d8f233 100644
--- a/tests/test_internal_api.py
+++ b/tests/test_internal_api.py
@@ -1,4 +1,5 @@
 """Tests for Fava's main Flask app."""
+
 from __future__ import annotations
 
 from typing import TYPE_CHECKING