diff --git a/docs/custom-container/enable-all-container.rst b/docs/custom-container/enable-all-container.rst
index 1ae2ffe9..4b1bdb83 100644
--- a/docs/custom-container/enable-all-container.rst
+++ b/docs/custom-container/enable-all-container.rst
@@ -40,7 +40,7 @@ container you want to run.
 
 
 Configure additional container
-=============================
+==============================
 
 The additional container also provide many configuration options just as the default ones do.
 That includes, but is not limited to: