diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index ab2923e..010baf4 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -20,3 +20,6 @@ sphinx:
 python:
  install:
   - requirements: docs/requirements.txt
+
+formats:
+  - pdf