diff --git a/.readthedocs.yml b/.readthedocs.yml
index e892543a..4d6ed364 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -3,6 +3,9 @@
 
 version: 2
 
+formats:
+  - pdf
+
 build:
   os: ubuntu-24.04
   tools: