diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 4b1790ab..98d5d0ff 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -9,4 +9,6 @@ python:
    install:
    - requirements: requirements.txt
 
-formats: []
+formats:
+  - epub
+  - pdf