diff --git a/pyproject.toml b/pyproject.toml
index 089ae30..8dc1a10 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -36,19 +36,14 @@ extend-ignore = ['E203', 'E231']
 manga-scan = "holt59.scans.__main__:main"
 
 [tool.poe.tasks]
-lint-black = "black --check --diff src typings"
-lint-isort = "isort -c src typings"
-lint-mypy = "mypy src typings"
+format-imports = "ruff check --select I src typings --fix"
+format-ruff = "ruff format src typings"
+format.sequence = ["format-imports", "format-ruff"]
 lint-ruff = "ruff check src typings"
+lint-ruff-format = "ruff format --check src typings"
 lint-pyright = "pyright src typings"
-lint-all.sequence = [
-    "lint-black",
-    "lint-isort",
-    "lint-mypy",
-    "lint-ruff",
-    "lint-pyright",
-]
-lint-all.ignore_fail = "return_non_zero"
+lint.sequence = ["lint-ruff", "lint-ruff-format", "lint-pyright"]
+lint.ignore_fail = "return_non_zero"
 
 [tool.isort]
 profile = "black"
@@ -67,6 +62,9 @@ ignore_missing_imports = true
 line-length = 88
 target-version = "py311"
 
+[tool.ruff.lint]
+extend-select = ["B", "Q", "I"]
+
 [tool.pyright]
 exclude = ["lib", "**/.*", "venv", "build"]
 typeCheckingMode = "strict"
diff --git a/src/holt59/scans/__main__.py b/src/holt59/scans/__main__.py
index 5dc5d75..a089617 100644
--- a/src/holt59/scans/__main__.py
+++ b/src/holt59/scans/__main__.py
@@ -35,7 +35,7 @@ def fetch_chapters(
     fetcher: ScanFetcher[_MangaT, _ChapterT],
     name: str,
     folder: Path,
-    ignore: set[str] = set(),
+    ignore: frozenset[str] = frozenset(),
 ):
     manga = fetcher.find_manga(name)
     assert manga is not None
@@ -67,7 +67,7 @@ def fetch_chapters(
             )
 
 
-def parse_ignore(value: str) -> set[str]:
+def parse_ignore(value: str) -> frozenset[str]:
     """
     Parse a set of ignore numbers.
 
@@ -94,7 +94,7 @@ def parse_ignore(value: str) -> set[str]:
         except ValueError:
             ignore.add(part)
 
-    return ignore
+    return frozenset(ignore)
 
 
 def main() -> None:
diff --git a/src/holt59/scans/lelscans.py b/src/holt59/scans/lelscans.py
index 04c7b7d..95c4096 100644
--- a/src/holt59/scans/lelscans.py
+++ b/src/holt59/scans/lelscans.py
@@ -1,5 +1,3 @@
-# -*- encoding: utf-8 -*-
-
 import logging
 import tempfile
 import urllib.error
diff --git a/src/holt59/scans/scans.py b/src/holt59/scans/scans.py
index 898eaf1..ae71f29 100644
--- a/src/holt59/scans/scans.py
+++ b/src/holt59/scans/scans.py
@@ -1,5 +1,3 @@
-# -*- encoding: utf-8 -*-
-
 import re
 from abc import abstractmethod
 from dataclasses import dataclass