diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 98510d94dd302405db5ca69b0348fa27ce8ac7aa..deb4dc9349c29cd50178e162c177b6e09b20f798 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -11,4 +11,4 @@ sphinx:
   configuration: source/conf.py
 formats:
   - pdf
-  - hmlzip
+  - htmlzip