diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 76eab0a..04f3dbc 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -12,6 +12,7 @@ sphinx:
 # Optionally build your docs in additional formats such as PDF
 formats:
    - pdf
+   - epub
 
 # Optionally set the version of Python and requirements required to build your docs
 python: