diff --git a/docs/ansible_detailed.rst b/docs/ansible_detailed.rst
index e692c43a..ff5f9dcb 100644
--- a/docs/ansible_detailed.rst
+++ b/docs/ansible_detailed.rst
@@ -145,6 +145,8 @@ Noteworthy Differences
   +-----------------+ 3.11 - 3.14     |
   | 12              |                 |
   +-----------------+-----------------+
+  | 13              | 3.12 - 3.14     |
+  +-----------------+-----------------+
 
   Verify your installation is running one of these versions by checking
   ``ansible --version`` output.
diff --git a/docs/changelog.rst b/docs/changelog.rst
index ce87cb01..7b02c56e 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -24,6 +24,8 @@ In progress (unreleased)
 * :gh:issue:`1237` :mod:`mitogen`: Re-declare Python 2.4 compatibility
 * :gh:issue:`1385` :mod:`ansible_mitogen`: Remove a use of
   ``ansible.module_utils.six``
+* :gh:issue:`1354` docs: Document Ansible 13 (ansible-core 2.20) support
+
 
 v0.3.35 (2025-12-01)
 --------------------
diff --git a/tox.ini b/tox.ini
index 28c97496..3ef977ac 100644
--- a/tox.ini
+++ b/tox.ini
@@ -63,7 +63,7 @@ envlist =
     py{27,36}-m_ans-ans{2.10,3,4}
     py{311}-m_ans-ans{2.10,3-5}
     py{313}-m_ans-ans{6-9}
-    py{314}-m_ans-ans{10-12}
+    py{314}-m_ans-ans{10-13}
     py{27,36,314}-m_mtg
     report,