diff --git a/.github/scripts/get_latest_changelog.py b/.github/scripts/get_latest_changelog.py
index 5616efb..2382f58 100644
--- a/.github/scripts/get_latest_changelog.py
+++ b/.github/scripts/get_latest_changelog.py
@@ -29,6 +29,7 @@
 
 ```
 """
+
 import re
 
 h2 = r"^##\s.*$"
diff --git a/hatch_version_hook.py b/hatch_version_hook.py
index d7024ea..222ef81 100644
--- a/hatch_version_hook.py
+++ b/hatch_version_hook.py
@@ -7,7 +7,6 @@
 from hatchling.builders.hooks.plugin.interface import BuildHookInterface
 from typing import Any, Optional
 
-
 _logger = logging.Logger(__name__, logging.INFO)
 _stdout_handler = logging.StreamHandler(sys.stdout)
 _stdout_handler.addFilter(lambda record: record.levelno <= logging.INFO)
diff --git a/requirements-testing.txt b/requirements-testing.txt
index 97116eb..fd78099 100644
--- a/requirements-testing.txt
+++ b/requirements-testing.txt
@@ -1,9 +1,12 @@
 coverage[toml] == 7.*
-pytest == 8.4.*
+pytest == 9.1.*; python_version >= "3.10"
+pytest == 8.4.*; python_version < "3.10"
 pytest-cov == 7.1.*
 pytest-timeout == 2.4.*
 pytest-xdist == 3.8.*
 types-PyYAML == 6.*
-black == 25.*
-mypy == 1.19.*
+black == 26.*; python_version >= "3.10"
+black == 25.*; python_version < "3.10"
+mypy == 2.1.*; python_version >= "3.10"
+mypy == 1.19.*; python_version < "3.10"
 ruff == 0.15.*
diff --git a/src/openjd/__main__.py b/src/openjd/__main__.py
index f777da6..33e32c6 100644
--- a/src/openjd/__main__.py
+++ b/src/openjd/__main__.py
@@ -2,5 +2,4 @@
 
 from .cli._create_argparser import main
 
-
 main()
diff --git a/src/openjd/cli/_create_argparser.py b/src/openjd/cli/_create_argparser.py
index bc92cf5..ad059a2 100644
--- a/src/openjd/cli/_create_argparser.py
+++ b/src/openjd/cli/_create_argparser.py
@@ -14,7 +14,6 @@
 from ._run import populate_argparser as populate_run_subparser
 from ._schema import populate_argparser as populate_schema_subparser
 
-
 # Our CLI subcommand construction requires that all leaf subcommands define a default
 # 'func' property which is a Callable[[],None] that implements the subcommand.
 # After parsing, we call that `func` argument of the resulting args object.
diff --git a/test/openjd/cli/test_run_command.py b/test/openjd/cli/test_run_command.py
index 7285328..df0d656 100644
--- a/test/openjd/cli/test_run_command.py
+++ b/test/openjd/cli/test_run_command.py
@@ -23,7 +23,6 @@
 from openjd.cli._run._local_session._session_manager import LoggingTimestampFormat
 from openjd.sessions import LOG as SessionsLogger, PathMappingRule, PathFormat
 
-
 PARAMETRIZE_CASES: tuple = (
     pytest.param(
         "basic.yaml",