diff --git a/.readthedocs.yml b/.readthedocs.yml
index eebdf2c0..71a01446 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -31,5 +31,8 @@ sphinx:
   configuration: docs/conf.py
   fail_on_warning: false
 
+formats:
+  - htmlzip
+
 conda:
   environment: docs/environment.yml