diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 357b476..4db1d61 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -22,3 +22,7 @@ build:
 
 sphinx:
   configuration: docs/conf.py
+
+formats:
+  - pdf
+  - epub