diff --git a/docs/index.rst b/docs/index.rst
index c802f04..202fa79 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -8,6 +8,9 @@ This is `Sideshow`_ with integration for `CORE-POS`_.
 
 .. _CORE-POS: https://www.core-pos.com/
 
+.. image:: https://img.shields.io/badge/code%20style-black-000000.svg
+   :target: https://github.com/psf/black
+
 
 .. toctree::
    :maxdepth: 1