diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 2e49eff..7ed1069 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -10,6 +10,9 @@ sphinx:
   builder: html
   configuration: docs/conf.py
 
+formats:
+  - all
+
 # Optionally set the version of Python and requirements required to build your docs
 python:
    version: 3.7