diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index b5668c4..a4e90aa 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -18,10 +18,10 @@ jobs:
         GITHUB_CONTEXT: ${{ toJson(github) }}
       run: echo "$GITHUB_CONTEXT"
 
-    - uses: actions/checkout@v2.2.0
+    - uses: actions/checkout@v4
 
     - name: Set up Python
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v5
       with:
         python-version: "3.x"
 
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index ff8df16..ce71c34 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -17,11 +17,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Set up Python
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v5
       with:
         python-version: '3.10'
 
-    - uses: actions/checkout@v2.2.0
+    - uses: actions/checkout@v4
 
     - name: Install deps
       run: python -mpip install -r requirements-dev.txt
@@ -33,11 +33,11 @@ jobs:
     strategy:
       matrix:
         python-version:
-        - '3.8'
         - '3.9'
         - '3.10'
         - '3.11'
-        - '3.12.0-alpha.0 - 3.12'
+        - '3.12'
+        - '3.13.0-alpha.0 - 3.13'
         - 'pypy-3.9'
         os-version:
         - 'ubuntu-latest'
@@ -55,7 +55,7 @@ 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 }}
 
@@ -73,5 +73,4 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
-    - uses: actions/setup-python@v4
-    - uses: pre-commit/action@v3.0.0
+    - uses: pre-commit/action@v3.0.1
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index c4770f8..131217d 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -6,18 +6,8 @@ default_language_version:
   python: python3
 
 repos:
-- repo: https://github.com/psf/black
-  rev: 23.7.0
-  hooks:
-  - id: black
-- repo: https://github.com/pycqa/isort
-  rev: 5.12.0
-  hooks:
-    - id: isort
-      name: isort (python)
-      args: ['--profile', 'black']
 - repo: https://github.com/pre-commit/pre-commit-hooks
-  rev: v4.4.0
+  rev: v4.6.0
   hooks:
   -   id: check-yaml
   -   id: end-of-file-fixer
@@ -25,10 +15,15 @@ repos:
   -   id: trailing-whitespace
       exclude: tests
 - repo: https://github.com/fsfe/reuse-tool
-  rev: v2.1.0
+  rev: v3.0.2
   hooks:
   - id: reuse
-- repo: https://github.com/pycqa/pylint
-  rev: v2.17.1
+- repo: https://github.com/astral-sh/ruff-pre-commit
+  # Ruff version.
+  rev: v0.4.3
   hooks:
-  - id: pylint
+    # Run the linter.
+    - id: ruff
+      args: [ --fix ]
+    # Run the formatter.
+    - id: ruff-format
diff --git a/leapseconddata/__init__.py b/leapseconddata/__init__.py
index e438e24..9379422 100755
--- a/leapseconddata/__init__.py
+++ b/leapseconddata/__init__.py
@@ -84,7 +84,7 @@ class LeapSecondData:
 
     def _check_validity(self, when: Optional[datetime.datetime]) -> Optional[str]:
         if when is None:
-            when = datetime.datetime.utcnow().replace(tzinfo=datetime.timezone.utc)
+            when = datetime.datetime.now(datetime.timezone.utc)
         if not self.valid_until:
             return "Data validity unknown"
         if when > self.valid_until:
diff --git a/setup.cfg b/setup.cfg
index 5e1d9c0..044748e 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -12,7 +12,6 @@ long_description_content_type = text/markdown
 url = https://github.com/jepler/leapseconddata
 classifiers =
     Programming Language :: Python :: 3
-    Programming Language :: Python :: 3.8
     Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
     Programming Language :: Python :: 3.11
@@ -25,7 +24,7 @@ classifiers =
 [options]
 package_dir =
     =.
-python_requires = >=3.8
+python_requires = >=3.9
 packages = leapseconddata
 
 [options.package_data]
diff --git a/testleapseconddata.py b/testleapseconddata.py
index 431dafa..885b9d8 100644
--- a/testleapseconddata.py
+++ b/testleapseconddata.py
@@ -5,6 +5,7 @@
 # SPDX-License-Identifier: GPL-3.0-only
 
 """Test most leapseconddata functionality"""
+
 # pylint: disable=missing-class-docstring,missing-function-docstring
 import datetime
 import unittest