diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 4d92db61b..4155a4e19 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -29,8 +29,8 @@ sphinx:
   # fail_on_warning: true
 
 # Optionally build your docs in additional formats such as PDF and ePub
-# formats:
-#   - pdf
+  formats:
+    - pdf
 #   - epub
 
 # Optional but recommended, declare the Python requirements required