diff --git a/api-ref/source/conf.py b/api-ref/source/conf.py
index 17886a2f08..511405d58d 100644
--- a/api-ref/source/conf.py
+++ b/api-ref/source/conf.py
@@ -26,9 +26,7 @@
 # serve to show the default.
 
 import os
-import subprocess
 import sys
-import warnings
 
 html_theme = 'openstackdocs'
 html_theme_options = {
@@ -63,19 +61,8 @@ source_suffix = '.rst'
 master_doc = 'index'
 
 # General information about the project.
-project = u'Orchestration API Reference'
 copyright = u'2010-present, OpenStack Foundation'
 
-# The version info for the project you're documenting, acts as replacement for
-# |version| and |release|, also used in various other places throughout the
-# built documents.
-#
-from heat.version import version_info
-# The full version, including alpha/beta/rc tags.
-release = version_info.release_string()
-# The short X.Y version.
-version = version_info.version_string()
-
 # openstackdocstheme options
 repository_name = 'openstack/heat'
 bug_project = 'heat'
@@ -152,17 +139,6 @@ pygments_style = 'sphinx'
 # so a file named "default.css" will overwrite the builtin "default.css".
 # html_static_path = ['_static']
 
-# If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
-# using the given strftime format.
-# html_last_updated_fmt = '%b %d, %Y'
-git_cmd = ["git", "log", "--pretty=format:'%ad, commit %h'", "--date=local",
-           "-n1"]
-try:
-    html_last_updated_fmt = subprocess.check_output(git_cmd).decode('utf-8')
-except Exception:
-    warnings.warn('Cannot get last updated time from git repository. '
-                  'Not setting "html_last_updated_fmt".')
-
 # If true, SmartyPants will be used to convert quotes and dashes to
 # typographically correct entities.
 # html_use_smartypants = True
diff --git a/doc/requirements.txt b/doc/requirements.txt
index c4373b4609..57ca58cd60 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -2,7 +2,7 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-openstackdocstheme>=1.18.1 # Apache-2.0
+openstackdocstheme>=1.20.0 # Apache-2.0
 os-api-ref>=1.4.0 # Apache-2.0
 sphinx!=1.6.6,!=1.6.7,!=2.1.0,>=1.6.2;python_version>='3.4' # BSD
 sphinx!=1.6.6,!=1.6.7,>=1.6.2,<2.0.0;python_version=='2.7' # BSD
diff --git a/doc/source/conf.py b/doc/source/conf.py
index 0532411440..1342c5be71 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -26,10 +26,8 @@
 
 import glob
 import os
-import subprocess
 import sys
 import tempfile
-import warnings
 
 from oslo_config import cfg
 
@@ -115,7 +113,6 @@ source_suffix = '.rst'
 master_doc = 'index'
 
 # General information about the project.
-project = u'Heat'
 copyright = u'(c) 2012- Heat Developers'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
@@ -183,7 +180,6 @@ apidoc_excluded_paths = [
 # html_theme = '_theme'
 html_theme = 'openstackdocs'
 
-html_last_updated_fmt = '%Y-%m-%d %H:%M'
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the
 # documentation.
@@ -217,17 +213,6 @@ html_static_path = ['_static']
 # robots.txt.
 html_extra_path = ['_extra']
 
-# If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
-# using the given strftime format.
-# html_last_updated_fmt = '%b %d, %Y'
-git_cmd = ["git", "log", "--pretty=format:'%ad, commit %h'", "--date=local",
-           "-n1"]
-try:
-    html_last_updated_fmt = subprocess.check_output(git_cmd).decode('utf-8')
-except Exception:
-    warnings.warn('Cannot get last updated time from git repository. '
-                  'Not setting "html_last_updated_fmt".')
-
 # If true, SmartyPants will be used to convert quotes and dashes to
 # typographically correct entities.
 # html_use_smartypants = True
@@ -271,17 +256,6 @@ htmlhelp_basename = 'Heatdoc'
 
 # -- 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])
 latex_documents = [
diff --git a/releasenotes/source/conf.py b/releasenotes/source/conf.py
index d0db3f0d75..1ae00908af 100644
--- a/releasenotes/source/conf.py
+++ b/releasenotes/source/conf.py
@@ -60,7 +60,6 @@ source_suffix = '.rst'
 master_doc = 'index'
 
 # General information about the project.
-project = u'Heat Release Notes'
 copyright = u'2015, Heat Developers'
 
 # Release notes are version independent, no need to set version and release
@@ -146,10 +145,6 @@ html_static_path = ['_static']
 # 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
@@ -193,17 +188,6 @@ htmlhelp_basename = 'HeatReleaseNotesdoc'
 
 # -- 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]).