diff --git a/README.rst b/README.rst
index 8ef2b1b..e60ea5d 100644
--- a/README.rst
+++ b/README.rst
@@ -159,7 +159,7 @@ WebSocket sample::
 
 
 How to enable `SNI <http://en.wikipedia.org/wiki/Server_Name_Indication>`_?
-------------------
+---------------------------------------------------------------------------
 
 SNI support is available for Python 2.7.9+ and 3.2+. It will be enabled automatically whenever possible.