diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 2062125..671ef4a 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -4,6 +4,7 @@ version: 2
 
 sphinx:
   builder: html
+  configuration: doc/source/conf.py
 
 build:
   os: "ubuntu-20.04"