diff --git a/libretranslate/api_keys.py b/libretranslate/api_keys.py
index dc1da3e..0583531 100644
--- a/libretranslate/api_keys.py
+++ b/libretranslate/api_keys.py
@@ -1,8 +1,10 @@
 import os
 import sqlite3
 import uuid
+
 import requests
 from expiringdict import ExpiringDict
+
 from libretranslate.default_values import DEFAULT_ARGUMENTS as DEFARGS
 
 DEFAULT_DB_PATH = DEFARGS['API_KEYS_DB_PATH']
@@ -12,14 +14,14 @@ class Database:
     def __init__(self, db_path=DEFAULT_DB_PATH, max_cache_len=1000, max_cache_age=30):
         # Legacy check - this can be removed at some point in the near future
         if os.path.isfile("api_keys.db") and not os.path.isfile("db/api_keys.db"):
-            print("Migrating %s to %s" % ("api_keys.db", "db/api_keys.db"))
+            print("Migrating {} to {}".format("api_keys.db", "db/api_keys.db"))
             try:
                 os.rename("api_keys.db", "db/api_keys.db")
             except Exception as e:
                 print(str(e))
 
         db_dir = os.path.dirname(db_path)
-        if not db_dir == "" and not os.path.exists(db_dir):
+        if db_dir != '' and not os.path.exists(db_dir):
             os.makedirs(db_dir)
         self.db_path = db_path
         self.cache = ExpiringDict(max_len=max_cache_len, max_age_seconds=max_cache_age)
@@ -91,10 +93,7 @@ class RemoteDatabase:
                 print("Cannot authenticate API key: " + str(e))
                 return None
 
-            if res.get('error', None) is None:
-                req_limit = res.get('req_limit', None)
-            else:
-                req_limit = None
+            req_limit = res.get('req_limit', None) if res.get('error', None) is None else None
             self.cache[api_key] = req_limit
 
         return req_limit
diff --git a/libretranslate/app.py b/libretranslate/app.py
index c5fe485..77197f2 100644
--- a/libretranslate/app.py
+++ b/libretranslate/app.py
@@ -1,30 +1,37 @@
 import io
 import os
-import tempfile
 import re
+import tempfile
 import uuid
+from datetime import datetime
 from functools import wraps
 from html import unescape
 from timeit import default_timer
-from datetime import datetime
 
 import argostranslatefiles
 from argostranslatefiles import get_supported_formats
-from flask import (abort, Blueprint, Flask, jsonify, render_template, request,
-                   Response, send_file, url_for, session)
+from flask import Blueprint, Flask, Response, abort, jsonify, render_template, request, send_file, session, url_for
+from flask_babel import Babel
+from flask_session import Session
 from flask_swagger import swagger
 from flask_swagger_ui import get_swaggerui_blueprint
-from flask_session import Session
 from translatehtml import translate_html
-from werkzeug.utils import secure_filename
 from werkzeug.exceptions import HTTPException
 from werkzeug.http import http_date
-from flask_babel import Babel
+from werkzeug.utils import secure_filename
 
-from libretranslate import scheduler, flood, secret, remove_translated_files, security, storage
+from libretranslate import flood, remove_translated_files, scheduler, secret, security, storage
 from libretranslate.language import detect_languages, improve_translation_formatting
-from libretranslate.locales import (_, _lazy, get_available_locales, get_available_locale_codes, gettext_escaped,
-        gettext_html, lazy_swag, get_alternate_locale_links)
+from libretranslate.locales import (
+    _,
+    _lazy,
+    get_alternate_locale_links,
+    get_available_locale_codes,
+    get_available_locales,
+    gettext_escaped,
+    gettext_html,
+    lazy_swag,
+)
 
 from .api_keys import Database, RemoteDatabase
 from .suggestions import Database as SuggestionsDatabase
@@ -150,10 +157,7 @@ def create_app(args):
         frontend_argos_language_source = languages[0]
 
 
-    if len(languages) >= 2:
-        language_target_fallback = languages[1]
-    else:
-        language_target_fallback = languages[0]
+    language_target_fallback = languages[1] if len(languages) >= 2 else languages[0]
 
     if args.frontend_language_target == "locale":
       def resolve_language_locale():
@@ -185,10 +189,7 @@ def create_app(args):
     if args.req_limit > 0 or args.api_keys or args.daily_req_limit > 0:
         api_keys_db = None
         if args.api_keys:
-            if args.api_keys_remote:
-                api_keys_db = RemoteDatabase(args.api_keys_remote)
-            else:
-                api_keys_db = Database(args.api_keys_db_path)
+            api_keys_db = RemoteDatabase(args.api_keys_remote) if args.api_keys_remote else Database(args.api_keys_db_path)
 
         from flask_limiter import Limiter
 
@@ -220,7 +221,7 @@ def create_app(args):
             os.mkdir(default_mp_dir)
           os.environ["PROMETHEUS_MULTIPROC_DIR"] = default_mp_dir
 
-      from prometheus_client import CONTENT_TYPE_LATEST, Summary, Gauge, CollectorRegistry, multiprocess, generate_latest
+      from prometheus_client import CONTENT_TYPE_LATEST, CollectorRegistry, Gauge, Summary, generate_latest, multiprocess
 
       @bp.route("/metrics")
       @limiter.exempt
@@ -544,10 +545,7 @@ def create_app(args):
                 )
 
         if args.char_limit != -1:
-            if batch:
-                chars = sum([len(text) for text in q])
-            else:
-                chars = len(q)
+            chars = sum([len(text) for text in q]) if batch else len(q)
 
             if args.char_limit < chars:
                 abort(
@@ -557,10 +555,7 @@ def create_app(args):
 
         if source_lang == "auto":
             source_langs = []
-            if batch:
-                auto_detect_texts = q
-            else:
-                auto_detect_texts = [q]
+            auto_detect_texts = q if batch else [q]
 
             overall_candidates = detect_languages(q)
 
@@ -1093,7 +1088,7 @@ def create_app(args):
             return override_lang
         return session.get('preferred_lang', request.accept_languages.best_match(get_available_locale_codes()))
 
-    babel = Babel(app, locale_selector=get_locale)
+    Babel(app, locale_selector=get_locale)
 
     app.jinja_env.globals.update(_e=gettext_escaped, _h=gettext_html)
 
diff --git a/libretranslate/detect.py b/libretranslate/detect.py
index 1b43087..8717658 100644
--- a/libretranslate/detect.py
+++ b/libretranslate/detect.py
@@ -2,10 +2,11 @@
 
 import pycld2 as cld2
 
+
 class UnknownLanguage(Exception):
   pass
 
-class Language(object):
+class Language:
   def __init__(self, choice):
     name, code, confidence, bytesize = choice
     self.code = code
@@ -23,7 +24,7 @@ class Language(object):
     return Language(("", code, 100, 0))
 
 
-class Detector(object):
+class Detector:
   """ Detect the language used in a snippet of text."""
 
   def __init__(self, text, quiet=False):
@@ -57,16 +58,15 @@ class Detector(object):
       self.reliable = False
       reliable, index, top_3_choices = cld2.detect(text, bestEffort=True)
       
-      if not self.quiet:
-        if not reliable:
-          raise UnknownLanguage("Try passing a longer snippet of text")
+      if not self.quiet and not reliable:
+        raise UnknownLanguage("Try passing a longer snippet of text")
 
     self.languages = [Language(x) for x in top_3_choices]
     self.language = self.languages[0]
     return self.language
 
   def __str__(self):
-    text = "Prediction is reliable: {}\n".format(self.reliable)
-    text += u"\n".join(["Language {}: {}".format(i+1, str(l))
+    text = f"Prediction is reliable: {self.reliable}\n"
+    text += "\n".join([f"Language {i+1}: {str(l)}"
                         for i,l in enumerate(self.languages)])
     return text
\ No newline at end of file
diff --git a/libretranslate/init.py b/libretranslate/init.py
index b6238fa..04aa866 100644
--- a/libretranslate/init.py
+++ b/libretranslate/init.py
@@ -1,4 +1,3 @@
-from pathlib import Path
 
 from argostranslate import package, translate
 
diff --git a/libretranslate/language.py b/libretranslate/language.py
index 1386bad..68e3e48 100644
--- a/libretranslate/language.py
+++ b/libretranslate/language.py
@@ -1,6 +1,6 @@
-import string
 
 from argostranslate import translate
+
 from libretranslate.detect import Detector, UnknownLanguage
 
 __languages = None
diff --git a/libretranslate/locales.py b/libretranslate/locales.py
index 896e6fa..9c08d4c 100644
--- a/libretranslate/locales.py
+++ b/libretranslate/locales.py
@@ -1,10 +1,11 @@
-import os
 import json
+import os
 from functools import lru_cache
+
 from flask_babel import gettext as _
 from flask_babel import lazy_gettext as _lazy
+from markupsafe import Markup, escape
 
-from markupsafe import escape, Markup
 
 @lru_cache(maxsize=None)
 def get_available_locales(only_reviewed=True, sort_by_name=False):
diff --git a/libretranslate/main.py b/libretranslate/main.py
index 0e02145..57dd723 100644
--- a/libretranslate/main.py
+++ b/libretranslate/main.py
@@ -197,7 +197,7 @@ def main():
             from waitress import serve
 
             url_scheme = "https" if args.ssl else "http"
-            print("Running on %s://%s:%s%s" % (url_scheme, args.host, args.port, args.url_prefix))
+            print(f"Running on {url_scheme}://{args.host}:{args.port}{args.url_prefix}")
 
             serve(
                 app,
diff --git a/libretranslate/manage.py b/libretranslate/manage.py
index 68beb61..d296388 100644
--- a/libretranslate/manage.py
+++ b/libretranslate/manage.py
@@ -49,7 +49,7 @@ def manage():
                 print("There are no API keys")
             else:
                 for item in keys:
-                    print("%s: %s" % item)
+                    print("{}: {}".format(*item))
 
         elif args.sub_command == "add":
             print(db.add(args.req_limit, args.key)[0])
diff --git a/libretranslate/scheduler.py b/libretranslate/scheduler.py
index 3300095..de54884 100644
--- a/libretranslate/scheduler.py
+++ b/libretranslate/scheduler.py
@@ -1,5 +1,7 @@
 import atexit
+
 from apscheduler.schedulers.background import BackgroundScheduler
+
 scheduler = None
 
 def setup(args):
diff --git a/libretranslate/secret.py b/libretranslate/secret.py
index a50fcc7..76cf606 100644
--- a/libretranslate/secret.py
+++ b/libretranslate/secret.py
@@ -1,9 +1,9 @@
-import atexit
 import random
 import string
 
 from libretranslate.storage import get_storage
 
+
 def generate_secret():
     return ''.join(random.choices(string.ascii_uppercase + string.digits, k=7))
 
diff --git a/libretranslate/security.py b/libretranslate/security.py
index 99415da..3c4023a 100644
--- a/libretranslate/security.py
+++ b/libretranslate/security.py
@@ -10,7 +10,7 @@ def path_traversal_check(unsafe_path, known_safe_path):
     unsafe_path = os.path.abspath(unsafe_path)
 
     if (os.path.commonprefix([known_safe_path, unsafe_path]) != known_safe_path):
-        raise SuspiciousFileOperation("{} is not safe".format(unsafe_path))
+        raise SuspiciousFileOperation(f"{unsafe_path} is not safe")
 
     # Passes the check
     return unsafe_path
\ No newline at end of file
diff --git a/libretranslate/suggestions.py b/libretranslate/suggestions.py
index 911b811..73944dd 100644
--- a/libretranslate/suggestions.py
+++ b/libretranslate/suggestions.py
@@ -1,5 +1,5 @@
-import sqlite3
 import os
+import sqlite3
 
 from expiringdict import ExpiringDict
 
@@ -10,7 +10,7 @@ class Database:
     def __init__(self, db_path=DEFAULT_DB_PATH, max_cache_len=1000, max_cache_age=30):
         # Legacy check - this can be removed at some point in the near future
         if os.path.isfile("suggestions.db") and not os.path.isfile("db/suggestions.db"):
-            print("Migrating %s to %s" % ("suggestions.db", "db/suggestions.db"))
+            print("Migrating {} to {}".format("suggestions.db", "db/suggestions.db"))
             try:
                 os.rename("suggestions.db", "db/suggestions.db")
             except Exception as e:
diff --git a/libretranslate/tests/test_api/conftest.py b/libretranslate/tests/test_api/conftest.py
index 3eb4f79..a1db034 100644
--- a/libretranslate/tests/test_api/conftest.py
+++ b/libretranslate/tests/test_api/conftest.py
@@ -1,4 +1,5 @@
 import sys
+
 import pytest
 
 from libretranslate.app import create_app
diff --git a/libretranslate/tests/test_api/test_api_translate.py b/libretranslate/tests/test_api/test_api_translate.py
index 96f8632..ae08052 100644
--- a/libretranslate/tests/test_api/test_api_translate.py
+++ b/libretranslate/tests/test_api/test_api_translate.py
@@ -43,7 +43,7 @@ def test_api_translate_unsupported_language(client):
     response_json = json.loads(response.data)
 
     assert "error" in response_json
-    assert "zz is not supported" == response_json["error"]
+    assert response_json["error"] == "zz is not supported"
     assert response.status_code == 400
 
 
@@ -57,5 +57,5 @@ def test_api_translate_missing_parameter(client):
     response_json = json.loads(response.data)
 
     assert "error" in response_json
-    assert "Invalid request: missing q parameter" == response_json["error"]
+    assert response_json["error"] == "Invalid request: missing q parameter"
     assert response.status_code == 400
diff --git a/libretranslate/tests/test_init.py b/libretranslate/tests/test_init.py
index 198f223..cd796df 100644
--- a/libretranslate/tests/test_init.py
+++ b/libretranslate/tests/test_init.py
@@ -1,6 +1,7 @@
-from libretranslate.init import boot
 from argostranslate import package
 
+from libretranslate.init import boot
+
 
 def test_boot_argos():
     """Test Argos translate models initialization"""
diff --git a/pyproject.toml b/pyproject.toml
index 7eeab4b..e9eaed8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -138,18 +138,18 @@ select = [
     "B",     # flake8-bugbear
     # "C",     # flake8-comprehensions
     "ICN",   # flake8-import-conventions
-    "SIM",   # flake8-simplify
+    # "SIM",   # flake8-simplify
     "TID",   # flake8-tidy-imports
     # "Q",     # flake8-quotes
-    "FBT",   # flake8-boolean-trap
+    # "FBT",   # flake8-boolean-trap
     "F",     # pyflakes
     "UP",    # pyupgrade
     # "E",     # pycodestyle errors
     # "W",     # pycodestyle warnings
-    "PLC",   # pylint convention
+    # "PLC",   # pylint convention
     "PLE",   # pylint error
     # "PLR",   # pylint refactor
-    "PLW",   # pylint warning
+    # "PLW",   # pylint warning
     "RUF",   # ruff specific
     "T",
 ]
@@ -158,8 +158,9 @@ ignore = [
     # "E741", # From original flake8 ignore
     # "B008", # do not perform function calls in argument defaults (required for FastAPI afaik)
     "E501", # line too long
-    # "C901", # too complex
+    "A003", # Class attribute is shadowing a python builtin
     "S101", # Use of `assert` detected
+    "S311", # Standard pseudo-random generators are not suitable for cryptographic purposes
     "T201", "T203", # remove print and pprint
     "E402", # Module level import not at top of file
 ]
diff --git a/scripts/compile_locales.py b/scripts/compile_locales.py
index 5aff9af..2920354 100755
--- a/scripts/compile_locales.py
+++ b/scripts/compile_locales.py
@@ -1,6 +1,7 @@
 #!/usr/bin/env python
-import sys
 import os
+import sys
+
 sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))
 from babel.messages.frontend import main as pybabel
 
@@ -15,7 +16,7 @@ if __name__ == "__main__":
             link = "https://hosted.weblate.org/translate/libretranslate/app/%s/" % l['code']
             if l['code'] == 'en':
                 link = "https://hosted.weblate.org/projects/libretranslate/app/"
-            print("%s | %s | %s" % (l['name'], ':heavy_check_mark:' if l['reviewed'] else '', "[Edit](%s)" % link))
+            print("{} | {} | {}".format(l['name'], ':heavy_check_mark:' if l['reviewed'] else '', "[Edit](%s)" % link))
     else:
         locales_dir = os.path.join("libretranslate", "locales")
         if not os.path.isdir(locales_dir):
diff --git a/scripts/gunicorn_conf.py b/scripts/gunicorn_conf.py
index 845da5b..8c4f709 100644
--- a/scripts/gunicorn_conf.py
+++ b/scripts/gunicorn_conf.py
@@ -1,7 +1,9 @@
-from prometheus_client import multiprocess
 import re
 import sys
 
+from prometheus_client import multiprocess
+
+
 def child_exit(server, worker):
     multiprocess.mark_process_dead(worker.pid)
 
@@ -35,7 +37,7 @@ def on_starting(server):
 
     args = get_args()
     
-    from libretranslate import storage, scheduler, flood, secret
+    from libretranslate import flood, scheduler, secret, storage
     storage.setup(args.shared_storage)
     scheduler.setup(args)
     flood.setup(args)
diff --git a/scripts/healthcheck.py b/scripts/healthcheck.py
index cd62b4f..20eba19 100644
--- a/scripts/healthcheck.py
+++ b/scripts/healthcheck.py
@@ -1,4 +1,5 @@
 import requests
+
 response = requests.post(
     url='http://0.0.0.0:5000/translate',
     headers={'Content-Type': 'application/json'},
diff --git a/scripts/install_models.py b/scripts/install_models.py
index d844afb..2d3d313 100755
--- a/scripts/install_models.py
+++ b/scripts/install_models.py
@@ -1,8 +1,10 @@
 #!/usr/bin/env python
-import sys
 import os
+import sys
+
 sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))
 import argparse
+
 from libretranslate.init import check_and_install_models
 
 if __name__ == "__main__":
diff --git a/scripts/suggestions-to-jsonl.py b/scripts/suggestions-to-jsonl.py
index 6cd8e62..7492ac0 100755
--- a/scripts/suggestions-to-jsonl.py
+++ b/scripts/suggestions-to-jsonl.py
@@ -1,8 +1,8 @@
 #!/usr/bin/env python
 import argparse
-import time
-import sqlite3
 import json
+import sqlite3
+import time
 
 if __name__ == "__main__":
     parser = argparse.ArgumentParser(description="Program to generate JSONL files from a LibreTranslate's suggestions.db")
diff --git a/scripts/update_locales.py b/scripts/update_locales.py
index 1fd2853..93c35fa 100755
--- a/scripts/update_locales.py
+++ b/scripts/update_locales.py
@@ -1,17 +1,19 @@
 #!/usr/bin/env python
-import sys
 import os
+import sys
+
 sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))
-import re
-import polib
 import json
+import re
+
+import polib
 from babel.messages.frontend import main as pybabel
-from libretranslate.language import load_languages, improve_translation_formatting
-from libretranslate.locales import get_available_locale_codes, swag_eval
-from translatehtml import translate_html
-from libretranslate.app import get_version, create_app
-from libretranslate.main import get_args
 from flask_swagger import swagger
+from libretranslate.app import create_app, get_version
+from libretranslate.language import improve_translation_formatting, load_languages
+from libretranslate.locales import get_available_locale_codes, swag_eval
+from libretranslate.main import get_args
+from translatehtml import translate_html
 
 # Update strings
 if __name__ == "__main__":
@@ -74,7 +76,7 @@ if __name__ == "__main__":
         if not os.path.isfile(meta_file):
             with open(meta_file, 'w') as f:
                 f.write(json.dumps({
-                    'name': next((lang.name for lang in languages if lang.code == l)),
+                    'name': next(lang.name for lang in languages if lang.code == l),
                     'reviewed': False
                 }, indent=4))
                 print("Wrote %s" % meta_file)