diff --git a/docs/extrinsic-metadata-specification.rst b/docs/extrinsic-metadata-specification.rst
--- a/docs/extrinsic-metadata-specification.rst
+++ b/docs/extrinsic-metadata-specification.rst
@@ -83,7 +83,7 @@
 
 
 Storage API
-~~~~~~~~~~~
+-----------
 
 Authorities and metadata fetchers
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -114,8 +114,8 @@
 With fetchers, the `metadata` field is reserved for configuration metadata
 and other technical usage.
 
-Origin metadata storage
------------------------
+Origin metadata
+^^^^^^^^^^^^^^^
 
 Extrinsic metadata are stored in SWH's :term:`storage database`.
 The storage API offers three endpoints to manipulate origin metadata: