diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index 8018c4ec..e6649244 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -38,7 +38,7 @@ jobs:
     strategy:
       matrix:
         os: [macos-latest, windows-latest, ubuntu-latest]
-        python-version: ["3.8", "3.12"]
+        python-version: ["3.8", "3.13"]
       fail-fast: false
     steps:
       - name: Checkout code
@@ -99,7 +99,7 @@ jobs:
       (github.event.pull_request.head.repo.full_name == github.repository && github.actor != 'dependabot[bot]')
     strategy:
       matrix:
-        python-version: ["3.8", "3.12"]
+        python-version: ["3.8", "3.13"]
       fail-fast: false
     permissions:
       contents: read
diff --git a/noxfile.py b/noxfile.py
index e7c46257..1941a62e 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -22,8 +22,8 @@
 ISORT_VERSION = "isort==5.13.2"
 LINT_PATHS = ["google", "tests", "noxfile.py", "setup.py"]
 
-SYSTEM_TEST_PYTHON_VERSIONS = ["3.8", "3.9", "3.10", "3.11", "3.12"]
-UNIT_TEST_PYTHON_VERSIONS = ["3.8", "3.9", "3.10", "3.11", "3.12"]
+SYSTEM_TEST_PYTHON_VERSIONS = ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
+UNIT_TEST_PYTHON_VERSIONS = ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
 
 
 @nox.session
diff --git a/setup.py b/setup.py
index 0033a3e0..b58a3110 100644
--- a/setup.py
+++ b/setup.py
@@ -71,6 +71,7 @@
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
         "Programming Language :: Python :: 3.12",
+        "Programming Language :: Python :: 3.13",
     ],
     platforms="Posix; MacOS X; Windows",
     packages=packages,