diff --git a/.readthedocs.yml b/.readthedocs.yml
index c3d165f5e5..0258daa283 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -9,5 +9,6 @@ python:
       path: .
       extra_requirements:
         - docs
+formats: all
 sphinx:
   fail_on_warning: True