diff --git a/lower-constraints.txt b/lower-constraints.txt
index c72e02b4..21df426e 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -28,7 +28,7 @@ mox3==0.20.0
 msgpack-python==0.4.0
 netaddr==0.7.18
 netifaces==0.10.4
-openstackdocstheme==1.18.1
+openstackdocstheme==1.20.0
 os-client-config==1.28.0
 os-testr==1.0.0
 oslo.config==5.2.0
diff --git a/releasenotes/source/conf.py b/releasenotes/source/conf.py
index a6da4544..1bef65c5 100644
--- a/releasenotes/source/conf.py
+++ b/releasenotes/source/conf.py
@@ -38,7 +38,6 @@ master_doc = 'index'
 
 # General information about the project.
 repository_name = u'openstack/monasca-persister'
-project = u'Monitoring Persister Release Notes'
 
 # Release notes do not need a version number in the title, they
 # cover multiple releases.
@@ -128,10 +127,6 @@ html_theme = 'openstackdocs'
 # directly to the root of the documentation.
 # html_extra_path = []
 
-# If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
-# using the given strftime format.
-html_last_updated_fmt = '%Y-%m-%d %H:%M'
-
 # If true, SmartyPants will be used to convert quotes and dashes to
 # typographically correct entities.
 # html_use_smartypants = True
@@ -174,17 +169,6 @@ htmlhelp_basename = 'MonitoringApiReleaseNotesDoc'
 
 # -- Options for LaTeX output ---------------------------------------------
 
-latex_elements = {
-    # The paper size ('letterpaper' or 'a4paper').
-    # 'papersize': 'letterpaper',
-
-    # The font size ('10pt', '11pt' or '12pt').
-    # 'pointsize': '10pt',
-
-    # Additional stuff for the LaTeX preamble.
-    # 'preamble': '',
-}
-
 # Grouping the document tree into LaTeX files. List of tuples
 # (source start file, target name, title,
 #  author, documentclass [howto, manual, or own class]).
diff --git a/test-requirements.txt b/test-requirements.txt
index be25cb7b..5f04b527 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -15,4 +15,4 @@ pycodestyle>=2.5.0 # MIT
 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
 reno>=2.5.0 # Apache-2.0
-openstackdocstheme>=1.18.1 # Apache-2.0
+openstackdocstheme>=1.20.0 # Apache-2.0