diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 3981111..bc490e7 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -20,3 +20,7 @@ sphinx:
 python:
   install:
   - requirements: sphinx_requirements.txt
+
+formats:
+  - epub
+  - pdf