diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 61c9009..0306c47 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -10,4 +10,4 @@ build:
 sphinx:
   configuration: docs/conf.py
   # disable this for more lenient docs builds
-  fail_on_warning: false
+  fail_on_warning: true