diff --git a/readthedocs.yaml b/readthedocs.yaml
index 09bdf9a5..6d31674d 100644
--- a/readthedocs.yaml
+++ b/readthedocs.yaml
@@ -7,6 +7,7 @@ version: 2
 
 # Build documentation in the doc/ directory with Sphinx
 sphinx:
+  builder: html
   configuration: doc/conf.py
 
 # Set the version of Python and other tools you might need