diff --git a/.readthedocs.yml b/.readthedocs.yml
index 635f9c9..7589968 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -2,6 +2,7 @@ version: 2
 
 sphinx:
   configuration: docs/source/conf.py
+  fail_on_warning: true
 
 build:
    os: ubuntu-20.04