diff --git a/doc/source/conf.py b/doc/source/conf.py
index 842a9697..4f3528eb 100755
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -24,9 +24,14 @@ extensions = [
 'sphinxcontrib.blockdiag',
 'sphinxcontrib.seqdiag',
 #'sphinx.ext.intersphinx',
- 'oslosphinx'
+ 'openstackdocstheme'
 ]
 
+# openstackdocstheme options
+repository_name = 'openstack/networking-bgpvpn'
+bug_project = 'bgpvpn'
+bug_tag = ''
+
 # autodoc generation is a bit aggressive and a nuisance when doing heavy
 # text edit cycles.
 # execute "export SPHINX_DEBUG=1" in your terminal to disable
@@ -58,6 +63,9 @@ pygments_style = 'sphinx'
 # html_theme_path = ["."]
 # html_theme = '_theme'
 # html_static_path = ['static']
+html_theme = 'openstackdocs'
+
+html_last_updated_fmt = '%Y-%m-%d %H:%M'
 
 # Output file base name for HTML help builder.
 htmlhelp_basename = '%sdoc' % project
diff --git a/releasenotes/source/conf.py b/releasenotes/source/conf.py
index 703eec36..8bf7fe65 100644
--- a/releasenotes/source/conf.py
+++ b/releasenotes/source/conf.py
@@ -36,10 +36,15 @@
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
 extensions = [
- 'oslosphinx',
+ 'openstackdocstheme',
 'reno.sphinxext',
 ]
 
+# openstackdocstheme options
+repository_name = 'openstack/networking-bgpvpn'
+bug_project = 'bgpvpn'
+bug_tag = ''
+
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']
 
@@ -110,7 +115,7 @@ pygments_style = 'sphinx'
 
 # The theme to use for HTML and HTML Help pages. See the documentation for
 # a list of builtin themes.
-html_theme = 'default'
+html_theme = 'openstackdocs'
 
 # 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
@@ -148,7 +153,7 @@ 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'
+html_last_updated_fmt = '%Y-%m-%d %H:%M'
 
 # If true, SmartyPants will be used to convert quotes and dashes to
 # typographically correct entities.
diff --git a/test-requirements.txt b/test-requirements.txt
index af8a1d54..f955f389 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -8,6 +8,7 @@ coverage!=4.4,>=4.0 # Apache-2.0
 django-nose>=1.4.4 # BSD
 python-subunit>=0.0.18 # Apache-2.0/BSD
 sphinx>=1.6.2 # BSD
+openstackdocstheme>=1.11.0 # Apache-2.0
 oslosphinx>=4.7.0 # Apache-2.0
 psycopg2>=2.5 # LGPL/ZPL
 PyMySQL>=0.7.6 # MIT License
</div><div class="naked_ctrl">
<form action="/index.cgi/larger-text" method="get" name="gate">
<p><a href="http://altstyle.alfasado.net">AltStyle</a> によって変換されたページ <a href="https://opendev.org/openstack/networking-bgpvpn/commit/ef0ea425282b72d59bf748e2cb0ec42d7644b145.diff">(-&gt;オリジナル)</a>
/ <label>アドレス: <input type="text" name="naked_post_url" value="https://opendev.org/openstack/networking-bgpvpn/commit/ef0ea425282b72d59bf748e2cb0ec42d7644b145.diff" size="22" /></label> <label>モード: <select name="naked_post_mode">
<option value="default">デフォルト</option>
<option value="speech">音声ブラウザ</option>
<option value="ruby">ルビ付き</option>
<option value="contrast">配色反転</option>
<option value="larger-text" selected="selected">文字拡大</option>
<option value="mobile">モバイル</option>
</select>
<input type="submit" value="表示" />
</p>
</form>
</div>