diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 23166bf..ca61dc1 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -26,6 +26,8 @@ build:
 sphinx:
   configuration: docs/source/conf.py
 
+formats:
+  - htmlzip
 
 # Optionally build your docs in additional formats such as PDF and ePub
 # formats: