diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..2fe6142
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,16 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+  - package-ecosystem: "pip"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "monthly"
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 24477cc..3976621 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -14,7 +14,7 @@ jobs:
     strategy:
       matrix:
         os: [ "ubuntu-latest", "macos-latest" ]
-        python-version: [ "3.7", "3.8", "3.9", "3.10" ]
+        python-version: [ "3.8", "3.12" ]
 
     env:
       OS: ${{ matrix.os }}
@@ -46,11 +46,13 @@ jobs:
         run: |
           make test-coverage
 
-      - name: Upload coverage results to Codecov
-        uses: codecov/codecov-action@v3
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v4
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
         with:
-          file: ./coverage.xml
+          files: ./coverage.xml
           flags: unittests
           env_vars: OS,PYTHON
           name: codecov-umbrella
-          fail_ci_if_error: false
+          fail_ci_if_error: true
diff --git a/.gitignore b/.gitignore
index ca91098..3f0015d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,6 +3,7 @@
 *.egg-info
 /.venv*
 /dist
+/doc/build
 /htmlcov
 .coverage
 coverage.xml
diff --git a/CHANGES.rst b/CHANGES.rst
index 9845a04..ca6b71a 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -5,7 +5,8 @@ CHANGES
 
 in progress
 ===========
-
+- Add support for Python 3.11 and 3.12
+- Replace ``appdirs`` with ``platformdirs``
 
 2022-08-05 0.13.1
 =================
diff --git a/Makefile b/Makefile
index 239f31c..41cf8ac 100644
--- a/Makefile
+++ b/Makefile
@@ -14,7 +14,6 @@ $(eval twine        := $(venvpath)/bin/twine)
 $(eval sphinx       := $(venvpath)/bin/sphinx-build)
 $(eval nose2        := $(venvpath)/bin/nose2)
 $(eval coverage     := $(venvpath)/bin/coverage)
-$(eval flake8       := $(venvpath)/bin/pflake8)
 $(eval black        := $(venvpath)/bin/black)
 $(eval isort        := $(venvpath)/bin/isort)
 $(eval proselint    := $(venvpath)/bin/proselint)
@@ -101,5 +100,6 @@ format: setup-virtualenv
 
 lint: setup-virtualenv
 	$(pip) install --requirement=requirements-utils.txt
-	$(flake8) beradio testing
+	$(black) --check beradio testing
+	$(isort) --check beradio testing
 	$(proselint) *.rst doc/source/**/*.rst
diff --git a/README.rst b/README.rst
index 20f632e..e8fac4e 100644
--- a/README.rst
+++ b/README.rst
@@ -1,36 +1,43 @@
-.. image:: https://github.com/hiveeyes/beradio/workflows/Tests/badge.svg
-    :target: https://github.com/hiveeyes/beradio/actions?workflow=Tests
+#######
+BERadio
+#######
+
+|
+
+.. start-badges
+
+|ci-tests| |ci-coverage| |license| |pypi-downloads|
+|python-versions| |status| |pypi-version|
+
+.. |ci-tests| image:: https://github.com/hiveeyes/beradio/actions/workflows/tests.yml/badge.svg
+    :target: https://github.com/hiveeyes/beradio/actions/workflows/tests.yml
     :alt: CI outcome
 
-.. image:: https://codecov.io/gh/hiveeyes/beradio/branch/main/graph/badge.svg
+.. |ci-coverage| image:: https://codecov.io/gh/hiveeyes/beradio/branch/main/graph/badge.svg
     :target: https://codecov.io/gh/hiveeyes/beradio
     :alt: Test suite code coverage
 
-.. image:: https://pepy.tech/badge/beradio/month
-    :target: https://pypi.org/project/beradio/
+.. |pypi-downloads| image:: https://static.pepy.tech/badge/beradio/month
+    :target: https://pepy.tech/project/beradio
     :alt: PyPI downloads per month
 
-.. image:: https://img.shields.io/pypi/v/beradio.svg
+.. |pypi-version| image:: https://img.shields.io/pypi/v/beradio.svg
     :target: https://pypi.org/project/beradio/
     :alt: Package version on PyPI
 
-.. image:: https://img.shields.io/pypi/status/beradio.svg
+.. |status| image:: https://img.shields.io/pypi/status/beradio.svg
     :target: https://pypi.org/project/beradio/
     :alt: Project status (alpha, beta, stable)
 
-.. image:: https://img.shields.io/pypi/pyversions/beradio.svg
+.. |python-versions| image:: https://img.shields.io/pypi/pyversions/beradio.svg
     :target: https://pypi.org/project/beradio/
     :alt: Support Python versions
 
-.. image:: https://img.shields.io/pypi/l/beradio.svg
+.. |license| image:: https://img.shields.io/pypi/l/beradio.svg
     :target: https://github.com/hiveeyes/beradio/blob/main/LICENSE
     :alt: Project license
 
-|
-
-##############
-BERadio README
-##############
+.. end-badges
 
 .. tip::
 
@@ -158,7 +165,7 @@ Thanks in advance for your efforts, we really appreciate any help or feedback.
 
 License
 =======
-This software is copyright © 2015-2022 The Hiveeyes developers. All rights reserved.
+This software is copyright © 2015-2024 The Hiveeyes developers. All rights reserved.
 
 Use of the source code included here is governed by the
 `GNU Affero General Public License <GNU-AGPL-3.0_>`_ and the
diff --git a/beradio/protocol.py b/beradio/protocol.py
index eac81b9..86533a3 100644
--- a/beradio/protocol.py
+++ b/beradio/protocol.py
@@ -104,7 +104,6 @@ def decode_safe(self, payload):
 
 
 class BERadioProtocol1(BERadioProtocolBase):
-
     """
     Example payload::
 
@@ -182,7 +181,6 @@ def to_v2(self, message1):
 
 
 class BERadioProtocol2(BERadioProtocolBase):
-
     """
     Example payload::
 
diff --git a/beradio/util.py b/beradio/util.py
index 354664a..3d4201d 100644
--- a/beradio/util.py
+++ b/beradio/util.py
@@ -12,7 +12,7 @@
 from uuid import uuid4
 
 import json_store
-from appdirs import user_data_dir
+from platformdirs import user_data_dir
 
 from beradio.gibberish import generate_word
 
diff --git a/doc/.gitignore b/doc/.gitignore
deleted file mode 100644
index 796b96d..0000000
--- a/doc/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-/build
diff --git a/doc/source/conf.py b/doc/source/conf.py
index 8d1d4dc..66eb60a 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -52,7 +52,7 @@
 
 # General information about the project.
 project = "BERadio"
-copyright = "2015-2022, The Hiveeyes Developers"
+copyright = "2015-2024, The Hiveeyes Developers"
 author = "The Hiveeyes Developers"
 
 # The version info for the project you're documenting, acts as replacement for
diff --git a/pyproject.toml b/pyproject.toml
index 5d74761..ca9d92e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,9 +6,6 @@ profile = "black"
 line_length = 120
 multi_line_output = 3
 
-[tool.flake8]
-max-line-length = 120
-
 [tool.pytest.ini_options]
 minversion = "2.0"
 addopts = "-rsfEX -p pytester --strict-markers --verbosity=3 --cov --cov-report=term-missing --cov-report=xml"
diff --git a/requirements-docs.txt b/requirements-docs.txt
index cd47ce4..539c241 100644
--- a/requirements-docs.txt
+++ b/requirements-docs.txt
@@ -1,2 +1,2 @@
-Sphinx<6
-sphinx_rtd_theme<2
+sphinx<8
+sphinx-rtd-theme<3
diff --git a/requirements-release.txt b/requirements-release.txt
index 236e1cd..ce722ca 100644
--- a/requirements-release.txt
+++ b/requirements-release.txt
@@ -1,5 +1,5 @@
 build
 wheel
 bump2version<2
-twine<5
-keyring<24
+twine<6
+keyring<26
diff --git a/requirements-utils.txt b/requirements-utils.txt
index 15f02a6..ec31605 100644
--- a/requirements-utils.txt
+++ b/requirements-utils.txt
@@ -1,5 +1,3 @@
-black
-isort
-pyproject-flake8
-flake8<5
-proselint
+black<25
+isort<6
+proselint<0.14
diff --git a/setup.py b/setup.py
index 4a4adfa..c485cab 100644
--- a/setup.py
+++ b/setup.py
@@ -11,7 +11,7 @@
     "paho-mqtt<2",
     "bencode.py<5",
     "docopt<1",
-    "appdirs<2",
+    "platformdirs<5",
     "json-store>=3.1,<4",
     # 'terkin==0.0.1',
 ]
@@ -49,6 +49,8 @@
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
+        "Programming Language :: Python :: 3.11",
+        "Programming Language :: Python :: 3.12",
         "Topic :: Communications",
         "Topic :: Internet",
         "Topic :: Scientific/Engineering",
diff --git a/testing/doctests_plus.py b/testing/doctests_plus.py
index d44326f..da68718 100644
--- a/testing/doctests_plus.py
+++ b/testing/doctests_plus.py
@@ -12,6 +12,7 @@
   extensions =
 
 """
+
 import doctest
 import os