diff --git a/.readthedocs.yml b/.readthedocs.yml
index ebd38255..448aca8b 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -3,6 +3,9 @@
 version: 2
 sphinx:
   configuration: docs/source/conf.py
+formats:
+  - htmlzip
+  - pdf
 python:
   install:
     - requirements: docs/source/requirements.txt