diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 29356c44..c139560c 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -12,3 +12,6 @@ sphinx:
 python:
   install:
     - requirements: docs/readthedocs/requirements.txt
+
+formats:
+  - pdf