diff --git a/README.rst b/README.rst
index 596006e10aa4557c2a9210ab31e1fc257bb1a4e8..5470c49699f98c6b2bf689ce01cc6a4a0d2471ca 100644
--- a/README.rst
+++ b/README.rst
@@ -32,6 +32,7 @@ Python versions:
 - *Python 3.8*
 - *Python 3.9*
 - *Python 3.10*
+- *Python 3.11*
 
 
 Why was this tool created?
diff --git a/docs/releasenotes.rst b/docs/releasenotes.rst
index 9ad4b0345f2b2f493c8d71e2756448a54dd784ec..10516bb1bcd3b044d443acae6f359f4ac1ad0a60 100644
--- a/docs/releasenotes.rst
+++ b/docs/releasenotes.rst
@@ -15,8 +15,9 @@ Release notes
 NEXT RELEASE
 ------------
 
-This release adds support for Python 3.10, drops support for Python
-3.5, 3.6, and 3.7, and updates package dependencies.
+This release adds support for Python 3.10 and 3.11, while dropping
+support for Python 3.5, 3.6, and 3.7. Package dependencies have been
+updated as well.
 
 .. warning::
 
@@ -31,6 +32,7 @@ Resolved issues:
 - **Tasks**:
 
   - `GC-42: Support for Python 3.10 <https://projects.majic.rs/gimmecert/issues/GC-42>`_
+  - `GC-43: Support for Python 3.11 <https://projects.majic.rs/gimmecert/issues/GC-43>`_
   - `GC-45: Drop support for Python 3.5, Python 3.6, and Python 3.7 <https://projects.majic.rs/gimmecert/issues/GC-45>`_
 
 
diff --git a/provision.sh b/provision.sh
index f179ca608ec9043455fcae07f1fc89afff3d60a2..f9e9079eb1156b179f129b19f87fe027983a22e7 100755
--- a/provision.sh
+++ b/provision.sh
@@ -44,7 +44,7 @@ apt-get install -qq -y make build-essential libssl-dev zlib1g-dev libbz2-dev lib
 sudo -i -u vagrant gpg -q --import /vagrant/provision/python_releases_signing_keys.pub
 
 # Download and build additional Python versions.
-python_versions=("3.8.18" "3.9.18" "3.10.13")
+python_versions=("3.8.18" "3.9.18" "3.10.13" "3.11.8")
 work_directory="/home/vagrant/src"
 
 echo "Setting-up work directory."
diff --git a/setup.py b/setup.py
index 4d87f6a1a76cf59faa55df48af1b15bc535b0e1a..ebec68f6853203c67cf4e055b3a649e47cf6c988 100755
--- a/setup.py
+++ b/setup.py
@@ -24,7 +24,7 @@ from setuptools import setup, find_packages
 
 README = open(os.path.join(os.path.dirname(__file__), 'README.rst')).read()
 
-python_requirements = ">=3.8,<3.11"
+python_requirements = ">=3.8,<3.12"
 
 install_requirements = [
     'cryptography>=42.0,<42.1',
@@ -91,6 +91,7 @@ setup(
         'Programming Language :: Python :: 3.8',
         'Programming Language :: Python :: 3.9',
         'Programming Language :: Python :: 3.10',
+        'Programming Language :: Python :: 3.11',
         'Topic :: Internet :: WWW/HTTP',
         'Topic :: Internet :: WWW/HTTP :: Site Management',
         'Topic :: Security',
diff --git a/tox.ini b/tox.ini
index 2e271d0dd15bb3a152e932240f2d7f024b0688c5..333e195a3332e01576fb2f100c74ceb935a56c67 100644
--- a/tox.ini
+++ b/tox.ini
@@ -18,7 +18,7 @@
 #
 
 [tox]
-envlist = {py38,py39,py310},lint,doc
+envlist = {py38,py39,py310,py311},lint,doc
 
 [testenv]
 allowlist_externals =
@@ -30,6 +30,7 @@ basepython =
   py38: python3.8
   py39: python3.9
   py310: python3.10
+  py311: python3.11
 
 deps =
   .[test]