diff --git a/.readthedocs.yml b/.readthedocs.yml
index d0664d0a3..65647cb37 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -23,9 +23,9 @@ sphinx:
   fail_on_warning: false
 
 # 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