diff --git a/source/index.rst b/source/index.rst
index 6191c6d..eaecbd1 100644
--- a/source/index.rst
+++ b/source/index.rst
@@ -13,7 +13,7 @@ Readme File
    :caption: Contents:
 
    .. include:: ../README.md
-   :parser: myst_parser.sphinx_
+      :parser: myst_parser.sphinx_
 
    modules