diff --git a/sphinx/source/conf.py b/sphinx/source/conf.py
index 28f0409..595875a 100644
--- a/sphinx/source/conf.py
+++ b/sphinx/source/conf.py
@@ -33,7 +33,7 @@ release = '0.0.1'
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
 extensions = [
-    'sphinxcontrib.plantuml',
+   'sphinxcontrib.plantuml',
    'myst_parser' 
 ]