diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 526e0844..7a48016a 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -12,7 +12,7 @@ submodules:
 sphinx:
   builder: html
   configuration: conf.py
-  fail_on_warning: false
+  fail_on_warning: true
 
 python:
   install: