diff --git a/.github/workflows/format.yml b/.github/workflows/format.yml
index 64a989cf..764fb579 100644
--- a/.github/workflows/format.yml
+++ b/.github/workflows/format.yml
@@ -4,18 +4,25 @@ on: [push, pull_request]
 
 jobs:
   format:
+    strategy:
+      matrix:
+        python-version:
+          - '3.12'
+
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v4
 
     - name: Set up Python
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v5
       with:
-        python-version: 3.8
+        python-version: ${{ matrix.python-version }}
 
     - name: Install dependencies
-      run: pip3 install .[dev]
+      run: |
+        pip3 install --upgrade setuptools
+        pip3 install .[dev]
 
     - name: Run --version
       run: oj --version
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index d2919a9f..acbe8953 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -21,7 +21,7 @@ jobs:
     - uses: actions/checkout@v4
 
     - name: Set up Python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
 
diff --git a/onlinejudge_command/download_history.py b/onlinejudge_command/download_history.py
index cb87db65..8be5372e 100644
--- a/onlinejudge_command/download_history.py
+++ b/onlinejudge_command/download_history.py
@@ -5,8 +5,8 @@
 from logging import getLogger
 from typing import *
 
-import onlinejudge_command.utils as utils
 from onlinejudge.type import Problem
+from onlinejudge_command import utils
 
 logger = getLogger(__name__)
 
diff --git a/onlinejudge_command/main.py b/onlinejudge_command/main.py
index 1bd14509..66351be9 100644
--- a/onlinejudge_command/main.py
+++ b/onlinejudge_command/main.py
@@ -8,7 +8,6 @@
 import onlinejudge.__about__ as api_version
 import onlinejudge_command.__0_workaround_for_conflict  # pylint: disable=unused-import
 import onlinejudge_command.__about__ as version
-import onlinejudge_command.log_formatter as log_formatter
 import onlinejudge_command.subcommand.download as subcommand_download
 import onlinejudge_command.subcommand.generate_input as subcommand_generate_input
 import onlinejudge_command.subcommand.generate_output as subcommand_generate_output
@@ -16,8 +15,7 @@
 import onlinejudge_command.subcommand.submit as subcommand_submit
 import onlinejudge_command.subcommand.test as subcommand_test
 import onlinejudge_command.subcommand.test_reactive as subcommand_test_reactive
-import onlinejudge_command.update_checking as update_checking
-import onlinejudge_command.utils as utils
+from onlinejudge_command import log_formatter, update_checking, utils
 
 logger = getLogger(__name__)
 
@@ -99,7 +97,7 @@ def main(args: Optional[List[str]] = None) -> 'NoReturn':
 
     try:
         sys.exit(run_program(parsed, parser=parser))
-    except NotImplementedError as e:
+    except NotImplementedError:
         logger.debug('\n' + traceback.format_exc())
         logger.error('NotImplementedError')
         logger.info('The operation you specified is not supported yet. Pull requests are welcome.')
diff --git a/onlinejudge_command/subcommand/download.py b/onlinejudge_command/subcommand/download.py
index bbd287e6..fd53a4ab 100644
--- a/onlinejudge_command/subcommand/download.py
+++ b/onlinejudge_command/subcommand/download.py
@@ -8,14 +8,12 @@
 
 import requests.exceptions
 
-import onlinejudge.dispatch as dispatch
 import onlinejudge_command.download_history
-import onlinejudge_command.format_utils as format_utils
-import onlinejudge_command.pretty_printers as pretty_printers
-import onlinejudge_command.utils as utils
+from onlinejudge import dispatch
 from onlinejudge.service.atcoder import AtCoderProblem
 from onlinejudge.service.yukicoder import YukicoderProblem
 from onlinejudge.type import SampleParseError, TestCase
+from onlinejudge_command import format_utils, pretty_printers, utils
 
 logger = getLogger(__name__)
 
diff --git a/onlinejudge_command/subcommand/generate_input.py b/onlinejudge_command/subcommand/generate_input.py
index cbeea835..9c4fba98 100644
--- a/onlinejudge_command/subcommand/generate_input.py
+++ b/onlinejudge_command/subcommand/generate_input.py
@@ -11,8 +11,7 @@
 from typing import *
 
 import onlinejudge_command.format_utils as fmtutils
-import onlinejudge_command.pretty_printers as pretty_printers
-import onlinejudge_command.utils as utils
+from onlinejudge_command import pretty_printers, utils
 
 logger = getLogger(__name__)
 
diff --git a/onlinejudge_command/subcommand/generate_output.py b/onlinejudge_command/subcommand/generate_output.py
index 9637490b..6f59a2d0 100644
--- a/onlinejudge_command/subcommand/generate_output.py
+++ b/onlinejudge_command/subcommand/generate_output.py
@@ -8,8 +8,7 @@
 from typing import *
 
 import onlinejudge_command.format_utils as fmtutils
-import onlinejudge_command.pretty_printers as pretty_printers
-import onlinejudge_command.utils as utils
+from onlinejudge_command import pretty_printers, utils
 
 logger = getLogger(__name__)
 
diff --git a/onlinejudge_command/subcommand/login.py b/onlinejudge_command/subcommand/login.py
index 392c6587..0c30910d 100644
--- a/onlinejudge_command/subcommand/login.py
+++ b/onlinejudge_command/subcommand/login.py
@@ -9,9 +9,9 @@
 
 import requests
 
-import onlinejudge.dispatch as dispatch
-import onlinejudge_command.utils as utils
+from onlinejudge import dispatch
 from onlinejudge.type import LoginError, Service
+from onlinejudge_command import utils
 
 logger = getLogger(__name__)
 
diff --git a/onlinejudge_command/subcommand/submit.py b/onlinejudge_command/subcommand/submit.py
index e50ccca8..075ed77a 100644
--- a/onlinejudge_command/subcommand/submit.py
+++ b/onlinejudge_command/subcommand/submit.py
@@ -7,11 +7,10 @@
 from logging import getLogger
 from typing import *
 
-import onlinejudge.dispatch as dispatch
 import onlinejudge_command.download_history
-import onlinejudge_command.pretty_printers as pretty_printers
-import onlinejudge_command.utils as utils
+from onlinejudge import dispatch
 from onlinejudge.type import *
+from onlinejudge_command import pretty_printers, utils
 
 logger = getLogger(__name__)
 
@@ -142,7 +141,7 @@ def run(args: argparse.Namespace) -> bool:
             return False
 
         # confirm
-        guessed_unmatch = ([problem.get_url()] != guessed_urls)
+        guessed_unmatch = [problem.get_url()] != guessed_urls
         if guessed_unmatch:
             samples_text = ('samples of "{}'.format('", "'.join(guessed_urls)) if guessed_urls else 'no samples')
             logger.warning('the problem "%s" is specified to submit, but %s were downloaded in this directory. this may be mis-operation', problem.get_url(), samples_text)
@@ -321,7 +320,10 @@ def guess_lang_ids_of_file(filename: pathlib.Path, code: bytes, language_dict, c
             saved_lang_ids = lang_ids
             lang_ids = []
             for compiler in ('gcc', 'clang'):  # use the latest for each compiler
-                ids = list(filter(lambda lang_id: parse_cplusplus_compiler(language_dict[lang_id]) in (compiler, None), saved_lang_ids))
+                ids = []
+                for lang_id in saved_lang_ids:
+                    if parse_cplusplus_compiler(language_dict[lang_id]) in (compiler, None):
+                        ids.append(lang_id)
                 if not ids:
                     continue
                 ids.sort(key=lambda lang_id: (parse_cplusplus_version(language_dict[lang_id]) or '', language_dict[lang_id]))
diff --git a/onlinejudge_command/subcommand/test.py b/onlinejudge_command/subcommand/test.py
index e4587012..465b5ab0 100644
--- a/onlinejudge_command/subcommand/test.py
+++ b/onlinejudge_command/subcommand/test.py
@@ -14,9 +14,7 @@
 from typing import *
 
 import onlinejudge_command.format_utils as fmtutils
-import onlinejudge_command.output_comparators as output_comparators
-import onlinejudge_command.pretty_printers as pretty_printers
-import onlinejudge_command.utils as utils
+from onlinejudge_command import output_comparators, pretty_printers, utils
 from onlinejudge_command.output_comparators import CompareMode
 
 logger = getLogger(__name__)
diff --git a/onlinejudge_command/subcommand/test_reactive.py b/onlinejudge_command/subcommand/test_reactive.py
index c31a9a64..31c58318 100644
--- a/onlinejudge_command/subcommand/test_reactive.py
+++ b/onlinejudge_command/subcommand/test_reactive.py
@@ -6,7 +6,7 @@
 from logging import getLogger
 from typing import *
 
-import onlinejudge_command.utils as utils
+from onlinejudge_command import utils
 
 logger = getLogger(__name__)
 
diff --git a/onlinejudge_command/utils.py b/onlinejudge_command/utils.py
index 24c420d6..6bc21685 100644
--- a/onlinejudge_command/utils.py
+++ b/onlinejudge_command/utils.py
@@ -19,8 +19,8 @@
 import colorama
 import requests
 
-import onlinejudge.utils as utils
 import onlinejudge_command.__about__ as version
+from onlinejudge import utils
 from onlinejudge.type import *
 
 logger = getLogger(__name__)
diff --git a/setup.cfg b/setup.cfg
index 2c6a3e84..79d48daf 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -20,8 +20,8 @@ selenium =
     selenium >= 3.141.0
 dev =
     isort == 5.7.0
-    mypy == 0.812
-    pylint == 2.7.0
+    mypy == 1.10.0
+    pylint == 3.1.0
     yapf == 0.30.0
     pytest >= 6.2.2, < 7
 
@@ -38,6 +38,8 @@ known_first_party = onlinejudge
 disable =
     broad-except,
     consider-using-enumerate,
+    consider-using-f-string,  # TODO: remove this
+    consider-using-with,  # TODO: remove this
     duplicate-code,
     fixme,
     invalid-name,
@@ -50,7 +52,6 @@ disable =
     no-else-raise,
     no-else-return,
     no-member,
-    no-self-use,
     redefined-builtin,
     too-few-public-methods,
     too-many-arguments,
@@ -62,6 +63,8 @@ disable =
     too-many-public-methods,
     too-many-return-statements,
     too-many-statements,
+    unnecessary-lambda-assignment,  # TODO: remove this
+    unspecified-encoding,  # TODO: remove this
     unused-argument,
     unused-wildcard-import,
     wildcard-import,
diff --git a/tests/implementation_language_guessing.py b/tests/implementation_language_guessing.py
index 8a17d639..fadcfd6b 100644
--- a/tests/implementation_language_guessing.py
+++ b/tests/implementation_language_guessing.py
@@ -2,8 +2,8 @@
 import textwrap
 import unittest
 
-import onlinejudge_command.subcommand.submit as submit
 from onlinejudge.type import Language, LanguageId
+from onlinejudge_command.subcommand import submit
 
 # https://atcoder.jp/contests/language-test-ver1
 languages_atcoder_3 = [