diff --git a/.github/workflows/black.yml b/.github/workflows/black.yml
index cd96de02..7f5ad38e 100644
--- a/.github/workflows/black.yml
+++ b/.github/workflows/black.yml
@@ -6,7 +6,7 @@ jobs:
   black-code-style:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: psf/black@stable
         with:
           version: "23.12.0"
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index 152e732e..e30f296c 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -30,7 +30,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
       with:
         # We must fetch at least the immediate parents so that if this is
         # a pull request then we can checkout the head.
diff --git a/.github/workflows/documentation.yml b/.github/workflows/documentation.yml
index 32efd1a4..c0615967 100644
--- a/.github/workflows/documentation.yml
+++ b/.github/workflows/documentation.yml
@@ -19,7 +19,7 @@ jobs:
 
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           submodules: 'recursive'
       - name: Install packages
diff --git a/.github/workflows/pythonpackage-windows.yml b/.github/workflows/pythonpackage-windows.yml
index 33fbdf48..a4633de3 100644
--- a/.github/workflows/pythonpackage-windows.yml
+++ b/.github/workflows/pythonpackage-windows.yml
@@ -12,10 +12,10 @@ jobs:
     runs-on: windows-latest
     strategy:
       matrix:
-        python-version: ['3.11', '3.12']
+        python-version: ['3.11', '3.12', '3.13']
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
       with:
         submodules: 'recursive'
     - name: Set up Python ${{ matrix.python-version }}
diff --git a/.github/workflows/pythonpackage.yml b/.github/workflows/pythonpackage.yml
index 0b4b8343..f49c6820 100644
--- a/.github/workflows/pythonpackage.yml
+++ b/.github/workflows/pythonpackage.yml
@@ -15,10 +15,10 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12']
+        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12', '3.13']
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
       with:
         submodules: 'recursive'
     - name: Set up Python ${{ matrix.python-version }}
diff --git a/setup.cfg b/setup.cfg
index e8fe3a3a..ccd2976f 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -24,6 +24,7 @@ classifiers =
     Programming Language :: Python :: 3.10
     Programming Language :: Python :: 3.11
     Programming Language :: Python :: 3.12
+    Programming Language :: Python :: 3.13
     Programming Language :: Python :: Implementation :: CPython
     Topic :: Software Development :: Libraries :: Python Modules
     Topic :: Office/Business :: Financial :: Point-Of-Sale
diff --git a/tox.ini b/tox.ini
index b058d514..9c421203 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py38, py39, py310, py311, docs, flake8
+envlist = py38, py39, py310, py311, py312, py313, docs, flake8
 
 [gh-actions]
 python =
@@ -11,6 +11,7 @@ python =
     3.10: py310
     3.11: py311
     3.12: py312
+    3.13: py313
 
 [testenv]
 deps = jaconv