diff --git a/releasenotes/source/index.rst b/releasenotes/source/index.rst
index c1bda029c..8e324b743 100644
--- a/releasenotes/source/index.rst
+++ b/releasenotes/source/index.rst
@@ -1,6 +1,6 @@
-===================
+====================
  Aodh Release Notes
-===================
+====================
 
 .. toctree::
    :maxdepth: 1
diff --git a/releasenotes/source/mitaka.rst b/releasenotes/source/mitaka.rst
index e54560965..0dc585c85 100644
--- a/releasenotes/source/mitaka.rst
+++ b/releasenotes/source/mitaka.rst
@@ -1,6 +1,6 @@
-===================================
+=============================
  Mitaka Series Release Notes
-===================================
+=============================
 
 .. release-notes::
    :branch: origin/stable/mitaka
diff --git a/releasenotes/source/newton.rst b/releasenotes/source/newton.rst
index 97036ed25..7b7d7352b 100644
--- a/releasenotes/source/newton.rst
+++ b/releasenotes/source/newton.rst
@@ -1,6 +1,6 @@
-===================================
+=============================
  Newton Series Release Notes
-===================================
+=============================
 
 .. release-notes::
    :branch: origin/stable/newton
diff --git a/releasenotes/source/ocata.rst b/releasenotes/source/ocata.rst
index ebe62f42e..9515f6cf0 100644
--- a/releasenotes/source/ocata.rst
+++ b/releasenotes/source/ocata.rst
@@ -1,6 +1,6 @@
-===================================
+============================
  Ocata Series Release Notes
-===================================
+============================
 
 .. release-notes::
    :branch: origin/stable/ocata