diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 4866193..1051da0 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -12,7 +12,7 @@ jobs:
     - name: Setup Python
       uses: actions/setup-python@v5
       with:
-        python-version: "3.8"
+        python-version: "3.10"
     - name: Install nox
       run: |
         python -m pip install --upgrade setuptools pip wheel
diff --git a/.github/workflows/unittest.yml b/.github/workflows/unittest.yml
index c66b757..1c9d078 100644
--- a/.github/workflows/unittest.yml
+++ b/.github/workflows/unittest.yml
@@ -45,7 +45,7 @@ jobs:
     - name: Setup Python
       uses: actions/setup-python@v5
       with:
-        python-version: "3.8"
+        python-version: "3.10"
     - name: Install coverage
       run: |
         python -m pip install --upgrade setuptools pip wheel
diff --git a/.kokoro/presubmit/presubmit.cfg b/.kokoro/presubmit/presubmit.cfg
index 8f43917..7773272 100644
--- a/.kokoro/presubmit/presubmit.cfg
+++ b/.kokoro/presubmit/presubmit.cfg
@@ -1 +1,6 @@
-# Format: //devtools/kokoro/config/proto/build.proto
\ No newline at end of file
+# Format: //devtools/kokoro/config/proto/build.proto
+
+env_vars: {
+    key: "NOX_SESSION"
+    value: "system blacken format"
+}
\ No newline at end of file
diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst
index 4167c6a..c047364 100644
--- a/CONTRIBUTING.rst
+++ b/CONTRIBUTING.rst
@@ -143,12 +143,12 @@ Running System Tests
    $ nox -s system
 
    # Run a single system test
-   $ nox -s system-3.8 -- -k <name of test>
+   $ nox -s system-3.10 -- -k <name of test>
 
 
   .. note::
 
-      System tests are only configured to run under Python 3.8.
+      System tests are only configured to run under Python 3.10.
       For expediency, we do not run them in older versions of Python 3.
 
   This alone will not run the tests. You'll need to change some local
diff --git a/noxfile.py b/noxfile.py
index 8c498fa..f9f8de9 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -32,7 +32,7 @@
 ISORT_VERSION = "isort==5.11.0"
 LINT_PATHS = ["docs", "google", "tests", "noxfile.py", "setup.py"]
 
-DEFAULT_PYTHON_VERSION = "3.8"
+DEFAULT_PYTHON_VERSION = "3.10"
 
 UNIT_TEST_PYTHON_VERSIONS: List[str] = [
     "3.7",
@@ -56,7 +56,7 @@
 UNIT_TEST_EXTRAS: List[str] = []
 UNIT_TEST_EXTRAS_BY_PYTHON: Dict[str, List[str]] = {}
 
-SYSTEM_TEST_PYTHON_VERSIONS: List[str] = ["3.8"]
+SYSTEM_TEST_PYTHON_VERSIONS: List[str] = ["3.10"]
 SYSTEM_TEST_STANDARD_DEPENDENCIES: List[str] = [
     "mock",
     "pytest",
diff --git a/owlbot.py b/owlbot.py
index 0864e69..c42e67f 100644
--- a/owlbot.py
+++ b/owlbot.py
@@ -27,9 +27,28 @@
 # ----------------------------------------------------------------------------
 templated_files = common.py_library(
     microgenerator=True,
+    default_python_version="3.10",
+    system_test_python_versions=["3.10"],
 )
 s.move(templated_files, excludes=["docs/multiprocessing.rst", "README.rst"])
 
+s.replace(
+    ".github/workflows/lint.yml",
+    'python-version: "3.8"',
+    'python-version: "3.10"'
+)
+
+s.replace(
+    ".kokoro/presubmit/presubmit.cfg",
+    """# Format: //devtools/kokoro/config/proto/build.proto""",
+    """# Format: //devtools/kokoro/config/proto/build.proto
+
+env_vars: {
+    key: "NOX_SESSION"
+    value: "system blacken format"
+}""",
+)
+
 python.py_samples(skip_readmes=True)
 
 s.replace(
@@ -40,5 +59,6 @@
     session.install\("--pre", "grpcio!=1.52.0rc1"\)""",
     ""
 )
+
 s.shell.run(["nox", "-s", "blacken"], hide_output=False)
 
diff --git a/setup.py b/setup.py
index 166bc5c..d125caf 100644
--- a/setup.py
+++ b/setup.py
@@ -83,6 +83,7 @@
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
         "Programming Language :: Python :: 3.12",
+        "Programming Language :: Python :: 3.13",
         "Operating System :: OS Independent",
         "Topic :: Internet",
     ],