diff --git a/.readthedocs.yml b/.readthedocs.yml
index 8aa32d549..1ac28c8ef 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -15,4 +15,5 @@ python:
 # Let the build fail if there are any warnings
 sphinx:
     builder: html
+    configuration: docs/source/conf.py
     fail_on_warning: true