diff --git a/.readthedocs.yml b/.readthedocs.yml
index b506c5f40..266d4e07a 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -9,6 +9,10 @@ python:
        path: .
      - requirements: doc/en/requirements.txt
 
+sphinx:
+  configuration: doc/en/conf.py
+  fail_on_warning: true
+
 build:
   os: ubuntu-20.04
   tools: