diff --git a/api-ref/source/conf.py b/api-ref/source/conf.py
index 6eba87f01..4cf19aaba 100644
--- a/api-ref/source/conf.py
+++ b/api-ref/source/conf.py
@@ -23,11 +23,8 @@
 # serve to show the default.
 
 import os
-import subprocess
 import sys
 
-from senlin.version import version_info
-
 extensions = [
     'os_api_ref',
     'openstackdocstheme',
@@ -61,18 +58,8 @@ source_suffix = '.rst'
 master_doc = 'index'
 
 # General information about the project.
-project = u'Clustering API Reference'
 copyright = u'2015-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.
-#
-# 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/senlin'
 bug_project = 'senlin'
@@ -149,14 +136,6 @@ 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"]
-html_last_updated_fmt = subprocess.check_output(
-    git_cmd).decode('utf-8')
-
 # 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 4999fe644..8d1d21ae1 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.
 # this is required for the docs build jobs
-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,>=1.6.5,<2.0.0;python_version=='2.7'  # BSD
 sphinx!=1.6.6,!=1.6.7,!=2.1.0,>=1.6.5;python_version>='3.4'  # BSD
diff --git a/doc/source/conf.py b/doc/source/conf.py
index d0c50e75b..c4cdd6dc9 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -68,18 +68,6 @@ master_doc = 'index'
 project = u'senlin'
 copyright = u'2015, 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
-#
-# "version" and "release" are used by the "log-a-bug" feature
-#
-# The short X.Y version.
-# The full version, including alpha/beta/rc tags.
-release = senlin_version.version_string_with_vcs()
-# The short X.Y version.
-version = senlin_version.canonical_version_string()
-
 # If true, '()' will be appended to :func: etc. cross-reference text.
 add_function_parentheses = True
 
@@ -104,8 +92,6 @@ html_theme = 'openstackdocs'
 # Output file base name for HTML help builder.
 htmlhelp_basename = '%sdoc' % project
 
-html_last_updated_fmt = '%Y-%m-%d %H:%M'
-
 # Grouping the document tree into LaTeX files. List of tuples
 # (source start file, target name, title, author, documentclass
 # [howto/manual]).
diff --git a/releasenotes/source/conf.py b/releasenotes/source/conf.py
index 6f0a929bb..0b48b7bf1 100644
--- a/releasenotes/source/conf.py
+++ b/releasenotes/source/conf.py
@@ -59,7 +59,6 @@ source_suffix = '.rst'
 master_doc = 'index'
 
 # General information about the project.
-project = u'Senlin Release Notes'
 copyright = u'2015, Senlin Developers'
 
 # Release  notes  are version independent.
@@ -149,10 +148,6 @@ 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
@@ -195,17 +190,6 @@ htmlhelp_basename = 'SenlinReleaseNotesdoc'
 
 # -- 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]).