diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 799deb1..6b53b9c 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -15,6 +15,8 @@ build:
 sphinx:
    configuration: docs/conf.py
 
+formats: all
+
 python:
    install:
    - requirements: docs/requirements.txt