diff --git a/releasenotes/source/index.rst b/releasenotes/source/index.rst
index 7a2c680..3d1c152 100644
--- a/releasenotes/source/index.rst
+++ b/releasenotes/source/index.rst
@@ -2,17 +2,17 @@
  release-test Release Notes
 ============================
 
- .. toctree::
-    :maxdepth: 1
+.. toctree::
+   :maxdepth: 1
 
-    unreleased
-    3.1
-    ussuri
-    train
-    stein
-    rocky
-    pike
-    queens
-    newton
-    mitaka
-    meiji
+   unreleased
+   3.1
+   ussuri
+   train
+   stein
+   rocky
+   pike
+   queens
+   newton
+   mitaka
+   meiji