diff --git a/doc/requirements.txt b/doc/requirements.txt
index e1ac5db..68aab85 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -10,6 +10,7 @@
 mock>=2.0.0 # BSD
 openstackdocstheme>=1.18.1 # Apache-2.0
 reno>=2.5.0 # Apache-2.0
-sphinx!=1.6.6,!=1.6.7,>=1.6.2 # BSD
+sphinx!=1.6.6,!=1.6.7,>=1.6.2,<2.0.0;python_version=='2.7'  # BSD
+sphinx!=1.6.6,!=1.6.7,>=1.6.2;python_version>='3.4'  # BSD
 sphinxcontrib-apidoc>=0.2.0  # BSD
 
diff --git a/releasenotes/source/rocky.rst b/releasenotes/source/rocky.rst
index 40dd517..6c5dfad 100644
--- a/releasenotes/source/rocky.rst
+++ b/releasenotes/source/rocky.rst
@@ -1,6 +1,6 @@
-===================================
- Rocky Series Release Notes
-===================================
+==========================
+Rocky Series Release Notes
+==========================
 
 .. release-notes::
    :branch: stable/rocky
diff --git a/releasenotes/source/stein.rst b/releasenotes/source/stein.rst
index efaceb6..6b7e725 100644
--- a/releasenotes/source/stein.rst
+++ b/releasenotes/source/stein.rst
@@ -1,6 +1,6 @@
-===================================
- Stein Series Release Notes
-===================================
+==========================
+Stein Series Release Notes
+==========================
 
 .. release-notes::
    :branch: stable/stein