diff --git a/README.rst b/README.rst
index f798044..58e24ee 100644
--- a/README.rst
+++ b/README.rst
@@ -35,7 +35,8 @@ completion::
 Or run ``python -m h5glance.completer`` to install tab completion hooks for bash
 and zsh.
 
-### HTML interface
+HTML interface
+--------------
 
 The HTML interface lets you inspect HDF5 files in a Jupyter Notebook.
 `Demo.ipynb <https://nbviewer.jupyter.org/github/European-XFEL/h5glance/blob/master/Demo.ipynb>`_