diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 000b069..bc3502e 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -16,7 +16,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.9", "3.10", "3.11", "3.12"]
 
     steps:
     - uses: actions/checkout@v4
diff --git a/tox.ini b/tox.ini
index 6713d86..edb654d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py37,py38,py39,py310,codestyle,dist-check,sort,security
+envlist = py39,py310,311,312,codestyle,dist-check,security
 skip_missing_interpreters = True
 
 [testenv]
@@ -9,9 +9,9 @@ commands = pytest -v tests/
 recreate = true
 
 [testenv:codestyle]
-deps = black
+deps = ruff
 commands =
-    black --check src/ tests/
+    ruff check src/ tests/
 
 [testenv:dist-check]
 deps =
@@ -21,11 +21,6 @@ commands =
     python -m build --outdir {distdir}
     twine check {distdir}/*
 
-[testenv:sort]
-deps =
-    isort
-commands = isort --check-only --profile=black src/ tests/
-
 [testenv:security]
 deps =
     bandit