diff --git a/documentation/operator-guide/configuration.rst b/documentation/operator-guide/configuration.rst
index 27b245cd6b4f87d8fbf490cd2ef86e7823e1ebbb..cc97e4a9284c9c8dd4d5249f8d83d8ed9170065c 100644
--- a/documentation/operator-guide/configuration.rst
+++ b/documentation/operator-guide/configuration.rst
@@ -494,7 +494,7 @@ preprocessing
     defaults.
 
 Sensitive variables
-===================
+-------------------
 
 Since environment variables include credentials that are considered sensitive,
 avoiding their exposure inside ``.env`` files would be the right practice.