diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index b6b92faf..71513bbb 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -7,8 +7,12 @@ sphinx:
 # We don't need PDF and epub for the docs.
 formats: []
 
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.11"
+
 python:
-  version: "3.8"
   system_packages: False
   install:
     - method: pip
diff --git a/src/towncrier/newsfragments/509.bugfix b/src/towncrier/newsfragments/509.bugfix
new file mode 100644
index 00000000..1488577d
--- /dev/null
+++ b/src/towncrier/newsfragments/509.bugfix
@@ -0,0 +1 @@
+Fix the ReadTheDocs build for ``towncrier`` which was broken due to the python version in use being 3.8. Upgrade to 3.11.