diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 3578144b2..61301bdb4 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -10,6 +10,9 @@ build:
 sphinx:
   configuration: docs/source/conf.py
 
+formats:
+  - pdf
+
 python:
   install:
     - method: pip