diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2194907dc..aa0f1cf76 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -64,7 +64,7 @@ jobs:
             fromJSON(
               inputs.cpython-versions
               && inputs.cpython-versions
-              || '["3.8", "3.9", "3.10", "3.11", "3.12"]'
+              || '["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]'
             )
           }}
         pip-version: >-
diff --git a/.github/workflows/cron.yml b/.github/workflows/cron.yml
index b38e15723..900d30aa0 100644
--- a/.github/workflows/cron.yml
+++ b/.github/workflows/cron.yml
@@ -11,6 +11,6 @@ jobs:
     uses: ./.github/workflows/ci.yml
     with:
       cpython-versions: >-
-        ["3.10", "3.11", "3.12"]
+        ["3.10", "3.11", "3.12", "3.13"]
       cpython-pip-version: >-
         ["main", "latest", "supported", "lowest"]
diff --git a/changelog.d/2251.feature.md b/changelog.d/2251.feature.md
new file mode 100644
index 000000000..12cb8972a
--- /dev/null
+++ b/changelog.d/2251.feature.md
@@ -0,0 +1 @@
+Test and declare Python 3.13 support -- by {user}`jayaddison` (for OpenCulinary).
diff --git a/pyproject.toml b/pyproject.toml
index 6a40c09b2..520e3cae0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -25,6 +25,7 @@ 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",
   "Programming Language :: Python :: Implementation :: PyPy",
   "Programming Language :: Python",
diff --git a/tox.ini b/tox.ini
index 5e46bf408..269b8974e 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,7 +1,7 @@
 [tox]
 envlist =
     # NOTE: keep this in sync with the env list in .github/workflows/ci.yml.
-    py{38,39,310,311,312,py3}-pip{supported,lowest,latest,main}-coverage
+    py{38,39,310,311,312,313,py3}-pip{supported,lowest,latest,main}-coverage
     pip{supported,lowest,latest,main}-coverage
     pip{supported,lowest,latest,main}
     checkqa