diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 969938f..527d135 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -23,9 +23,9 @@ sphinx:
   # fail_on_warning: true
 
 # Optionally build your docs in additional formats such as PDF and ePub
-# formats:
-#   - pdf
-#   - epub
+formats:
+  - pdf
+  - epub
 
 # Optional but recommended, declare the Python requirements required
 # to build your documentation