diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index c6a441b..be23c41 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -10,5 +10,6 @@ python:
     - requirements: requirements.txt
 
 sphinx:
+  configuration: source/conf.py
   builder: dirhtml
   fail_on_warning: true