diff --git a/releasenotes/source/index.rst b/releasenotes/source/index.rst
index d25b490..a9cb87e 100644
--- a/releasenotes/source/index.rst
+++ b/releasenotes/source/index.rst
@@ -2,25 +2,25 @@
  Ceilometer Middleware Release Notes
 ====================================
 
- .. toctree::
-    :maxdepth: 1
+.. toctree::
+   :maxdepth: 1
 
-    unreleased
-    2024.2
-    2024.1
-    2023.2
-    2023.1
-    zed
-    yoga
-    xena
-    wallaby
-    victoria
-    ussuri
-    train
-    stein
-    rocky
-    queens
-    pike
-    ocata
-    newton
-    mitaka
+   unreleased
+   2024.2
+   2024.1
+   2023.2
+   2023.1
+   zed
+   yoga
+   xena
+   wallaby
+   victoria
+   ussuri
+   train
+   stein
+   rocky
+   queens
+   pike
+   ocata
+   newton
+   mitaka