diff --git a/.github/workflows/python_ci.yml b/.github/workflows/python_ci.yml
index abbed83c..23b4400f 100644
--- a/.github/workflows/python_ci.yml
+++ b/.github/workflows/python_ci.yml
@@ -22,7 +22,7 @@ jobs:
     runs-on: "windows-2019"
     continue-on-error: ${{ matrix.config.experimental }}
     env:
-      USING_COVERAGE: '3.6,3.7,3.8,3.9,3.10,3.11,3.12.0-alpha.3,pypy-3.6,pypy-3.7,pypy-3.8,pypy-3.9'
+      USING_COVERAGE: '3.6,3.7,3.8,3.9,3.10,3.11,3.12.0-alpha.4,pypy-3.6,pypy-3.7,pypy-3.8,pypy-3.9'
 
     strategy:
       fail-fast: False
@@ -34,7 +34,7 @@ jobs:
           - {python-version: "3.9", testenvs: "py39,build", experimental: False}
           - {python-version: "3.10", testenvs: "py310,build", experimental: False}
           - {python-version: "3.11", testenvs: "py311,build", experimental: False}
-          - {python-version: "3.12.0-alpha.3", testenvs: "py312-dev,build", experimental: True}
+          - {python-version: "3.12.0-alpha.4", testenvs: "py312-dev,build", experimental: True}
           - {python-version: "pypy-3.6", testenvs: "pypy36,build", experimental: False}
           - {python-version: "pypy-3.7", testenvs: "pypy37,build", experimental: True}
           - {python-version: "pypy-3.8", testenvs: "pypy38,build", experimental: True}
diff --git a/.github/workflows/python_ci_linux.yml b/.github/workflows/python_ci_linux.yml
index 35f7b2e4..d1662b09 100644
--- a/.github/workflows/python_ci_linux.yml
+++ b/.github/workflows/python_ci_linux.yml
@@ -23,7 +23,7 @@ jobs:
     runs-on: "ubuntu-20.04"
     continue-on-error: ${{ matrix.config.experimental }}
     env:
-      USING_COVERAGE: '3.6,3.7,3.8,3.9,3.10,3.11,3.12.0-alpha.3,pypy-3.6,pypy-3.7,pypy-3.8,pypy-3.9'
+      USING_COVERAGE: '3.6,3.7,3.8,3.9,3.10,3.11,3.12.0-alpha.4,pypy-3.6,pypy-3.7,pypy-3.8,pypy-3.9'
 
     strategy:
       fail-fast: False
@@ -35,7 +35,7 @@ jobs:
           - {python-version: "3.9", testenvs: "py39,build", experimental: False}
           - {python-version: "3.10", testenvs: "py310,build", experimental: False}
           - {python-version: "3.11", testenvs: "py311,build", experimental: False}
-          - {python-version: "3.12.0-alpha.3", testenvs: "py312-dev,build", experimental: True}
+          - {python-version: "3.12.0-alpha.4", testenvs: "py312-dev,build", experimental: True}
           - {python-version: "pypy-3.6", testenvs: "pypy36,build", experimental: False}
           - {python-version: "pypy-3.7", testenvs: "pypy37,build", experimental: True}
           - {python-version: "pypy-3.8", testenvs: "pypy38,build", experimental: True}
diff --git a/.github/workflows/python_ci_macos.yml b/.github/workflows/python_ci_macos.yml
index 35d27f14..4e09dfef 100644
--- a/.github/workflows/python_ci_macos.yml
+++ b/.github/workflows/python_ci_macos.yml
@@ -22,7 +22,7 @@ jobs:
     runs-on: "macos-latest"
     continue-on-error: ${{ matrix.config.experimental }}
     env:
-      USING_COVERAGE: '3.6,3.7,3.8,3.9,3.10,3.11,3.12.0-alpha.3,pypy-3.7,pypy-3.8,pypy-3.9'
+      USING_COVERAGE: '3.6,3.7,3.8,3.9,3.10,3.11,3.12.0-alpha.4,pypy-3.7,pypy-3.8,pypy-3.9'
 
     strategy:
       fail-fast: False
@@ -34,7 +34,7 @@ jobs:
           - {python-version: "3.9", testenvs: "py39,build", experimental: False}
           - {python-version: "3.10", testenvs: "py310,build", experimental: False}
           - {python-version: "3.11", testenvs: "py311,build", experimental: False}
-          - {python-version: "3.12.0-alpha.3", testenvs: "py312-dev,build", experimental: True}
+          - {python-version: "3.12.0-alpha.4", testenvs: "py312-dev,build", experimental: True}
           - {python-version: "pypy-3.7", testenvs: "pypy37,build", experimental: True}
           - {python-version: "pypy-3.8", testenvs: "pypy38,build", experimental: True}
           - {python-version: "pypy-3.9", testenvs: "pypy39", experimental: True}
diff --git a/README.rst b/README.rst
index bdeb6521..5c60b931 100644
--- a/README.rst
+++ b/README.rst
@@ -108,7 +108,7 @@ domdf_python_tools
 	:target: https://github.com/domdfcoding/domdf_python_tools/commit/master
 	:alt: GitHub last commit
 
-.. |maintained| image:: https://img.shields.io/maintenance/yes/2022
+.. |maintained| image:: https://img.shields.io/maintenance/yes/2023
 	:alt: Maintenance
 
 .. |pypi-downloads| image:: https://img.shields.io/pypi/dm/domdf_python_tools
diff --git a/doc-source/index.rst b/doc-source/index.rst
index 5791318e..2c15042c 100644
--- a/doc-source/index.rst
+++ b/doc-source/index.rst
@@ -115,7 +115,7 @@ domdf_python_tools
 		:last-commit:
 		:alt: GitHub last commit
 
-	.. |maintained| maintained-shield:: 2022
+	.. |maintained| maintained-shield:: 2023
 		:alt: Maintenance
 
 	.. |pypi-downloads| pypi-shield::