diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 18f22f3..ba63cba 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -7,3 +7,10 @@ python:
     - requirements: docs/requirements.txt
 sphinx:
   builder: dirhtml
+formats:
+  - pdf
+  - epub
+build:
+  os: "ubuntu-22.04"
+  tools:
+    python: "3.11"