diff --git a/umn/source/conf.py b/umn/source/conf.py
index 4d48aab..8a6454b 100644
--- a/umn/source/conf.py
+++ b/umn/source/conf.py
@@ -96,7 +96,8 @@ html_static_path = ['_static']
 
 # -- Options for PDF output --------------------------------------------------
 latex_documents = [
-('index',
+
+    ('index',
      'cce-umn.tex',
      u'Cloud Container Service - User Guide',
      u'OpenTelekomCloud', 'manual'),