diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6a548c0..8eebe69 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -53,7 +53,7 @@ jobs:
       id-token: write
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
     env:
       HATCH_ENV_TYPE_VIRTUAL_PATH: ".venv"
       HATCH_ENV: "ci"
@@ -97,7 +97,7 @@ jobs:
           *) echo "Incorrect Hatch virtualenv." && exit 1 ;;
           esac
       - name: Test that Git tag version and Python package version match
-        if: github.ref_type == 'tag' && matrix.python-version == '3.12'
+        if: github.ref_type == 'tag' && matrix.python-version == '3.13'
         run: |
           GIT_TAG_VERSION=$GITHUB_REF_NAME
           PACKAGE_VERSION=$(hatch version)
@@ -139,7 +139,7 @@ jobs:
       - name: Upload Python package artifacts
         if: >
           github.ref_type == 'tag' &&
-          matrix.python-version == '3.12' &&
+          matrix.python-version == '3.13' &&
           needs.setup.outputs.environment-name == 'PyPI'
         uses: actions/upload-artifact@v4
         with:
diff --git a/pyproject.toml b/pyproject.toml
index 5eea388..cfa0ade 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,6 +15,7 @@ classifiers = [
   "Programming Language :: Python :: 3.10",
   "Programming Language :: Python :: 3.11",
   "Programming Language :: Python :: 3.12",
+  "Programming Language :: Python :: 3.13",
   "Topic :: Internet :: WWW/HTTP :: HTTP Servers",
   "Topic :: Software Development :: Libraries :: Application Frameworks",
   "Topic :: System :: Installation/Setup",