diff --git a/index.rst b/index.rst
index cf28662..fde0c65 100644
--- a/index.rst
+++ b/index.rst
@@ -2,7 +2,7 @@ SANE Standard
 =============
 
 .. toctree::
-   :numbered: 3
+   :numbered: 4
    :maxdepth: 3
    :caption: Contents: