diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 3dd472c..9854314 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -9,7 +9,7 @@ on:
 jobs:
   test:
     name: "Test Python ${{ matrix.python-version }}"
-    runs-on: "ubuntu-22.04"
+    runs-on: "ubuntu-24.04"
     strategy:
       fail-fast: false
       matrix:
@@ -18,6 +18,7 @@ jobs:
           "3.10",
           "3.11",
           "3.12",
+          "3.13",
         ]
     steps:
       - name: "Check out repository"
@@ -33,10 +34,10 @@ jobs:
       - name: "Install tox"
         run: |
           python -m pip install --upgrade pip
-          pip install tox tox-gh-actions
+          pip install tox
       - name: "Run tox"
         run: |
-          tox -- --cov ammcpc --cov-report xml:coverage.xml
+          tox -e py -- --cov ammcpc --cov-report xml:coverage.xml
       - name: "Upload coverage report"
         if: github.repository == 'artefactual-labs/ammcpc'
         uses: "codecov/codecov-action@v4"
@@ -48,14 +49,14 @@ jobs:
           CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
   lint:
     name: "Lint"
-    runs-on: "ubuntu-22.04"
+    runs-on: "ubuntu-24.04"
     steps:
       - name: "Check out repository"
         uses: "actions/checkout@v4"
       - name: "Set up Python"
         uses: "actions/setup-python@v5"
         with:
-          python-version: "3.12"
+          python-version: "3.x"
           cache: "pip"
           cache-dependency-path: |
             requirements.txt
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 18d070a..c580776 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,6 +1,6 @@
 repos:
 - repo: https://github.com/astral-sh/ruff-pre-commit
-  rev: v0.8.5
+  rev: v0.9.1
   hooks:
   - id: ruff
     args: [--fix, --exit-non-zero-on-fix]
diff --git a/ammcpc/ammcpc.py b/ammcpc/ammcpc.py
index 1feec4e..da64009 100644
--- a/ammcpc/ammcpc.py
+++ b/ammcpc/ammcpc.py
@@ -193,7 +193,7 @@ def _get_evt_out_inf_detail_v_0_3(self, policy_checks):
             )
         return (
             "pass",
-            f"{prefix} No checks passed, but none failed" " either.",
+            f"{prefix} No checks passed, but none failed either.",
         )
 
     def _get_evt_out_inf_detail_v_0_1(self, policy_checks):
@@ -223,7 +223,7 @@ def _get_evt_out_inf_detail_v_0_1(self, policy_checks):
             )
         return (
             "pass",
-            f"{prefix} No checks passed, but none failed" " either.",
+            f"{prefix} No checks passed, but none failed either.",
         )
 
     def _error(self, exc):
@@ -316,7 +316,7 @@ def _get_policy_checks(doc):
         return _get_policy_checks_v_0_1(doc)
     else:
         raise MediaConchException(
-            "Unable to parse MediaConch XML files with version" f' "{mc_xml_vrsn}"'
+            f'Unable to parse MediaConch XML files with version "{mc_xml_vrsn}"'
         )
 
 
diff --git a/pyproject.toml b/pyproject.toml
index fac5d04..6a815b9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -37,6 +37,7 @@ classifiers = [
   "Programming Language :: Python :: 3.10",
   "Programming Language :: Python :: 3.11",
   "Programming Language :: Python :: 3.12",
+  "Programming Language :: Python :: 3.13",
 ]
 authors = [
   {name = "Artefactual Systems Inc.", email = "info@artefactual.com"}
@@ -105,14 +106,7 @@ omit = [
 [tool.tox]
 legacy_tox_ini = """
     [tox]
-    envlist = py{39,310,311,312}, linting
-
-    [gh-actions]
-    python =
-        3.9: py39
-        3.10: py310
-        3.11: py311
-        3.12: py312
+    envlist = py, linting
 
     [testenv]
     skip_install = true
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 997a474..7743167 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -38,7 +38,7 @@ pytest==8.3.4
     #   pytest-cov
 pytest-cov==6.0.0
     # via ammcpc (pyproject.toml)
-ruff==0.8.5
+ruff==0.9.1
     # via ammcpc (pyproject.toml)
 tomli==2.2.1
     # via
@@ -54,5 +54,5 @@ zipp==3.21.0
 # The following packages are considered to be unsafe in a requirements file:
 pip==24.3.1
     # via pip-tools
-setuptools==75.6.0
+setuptools==75.8.0
     # via pip-tools