diff --git a/docs/plugins/sonosupdate.rst b/docs/plugins/sonosupdate.rst
index 5a7a6583b..4b47c9a6e 100644
--- a/docs/plugins/sonosupdate.rst
+++ b/docs/plugins/sonosupdate.rst
@@ -1,5 +1,5 @@
 SonosUpdate Plugin
-=================
+==================
 
 The ``sonosupdate`` plugin lets you automatically update `Sonos`_'s music
 library whenever you change your beets library.