diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 6380b34adec..26a07283f6d 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -17,7 +17,7 @@ build:
   os: ubuntu-24.04
   tools:
     python: >-
-      3.13
+      3.14
   apt_packages:
     - inkscape
   jobs:
diff --git a/doc/en/conf.py b/doc/en/conf.py
index 39cd169cdb3..8b259b03bf5 100644
--- a/doc/en/conf.py
+++ b/doc/en/conf.py
@@ -94,6 +94,8 @@
     # Undocumented third parties
     ("py:class", "_tracing.TagTracerSub"),
     ("py:class", "warnings.WarningMessage"),
+    # Python 3.14+ exposes the C accelerator module name.
+    ("py:class", "_py_warnings.WarningMessage"),
     # Undocumented type aliases
     ("py:class", "LEGACY_PATH"),
     ("py:class", "_PluggyPlugin"),
diff --git a/tox.ini b/tox.ini
index 5a8fa240898..515313a9bf6 100644
--- a/tox.ini
+++ b/tox.ini
@@ -128,7 +128,7 @@ setenv =
 description =
     build the documentation site under \
     `{toxinidir}{/}doc{/}en{/}_build{/}html` with `{basepython}`
-basepython = python3.13 # Sync with .readthedocs.yaml to get errors.
+basepython = python3.14 # Sync with .readthedocs.yaml to get errors.
 usedevelop = True
 deps =
     -r{toxinidir}/doc/en/requirements.txt