diff --git a/doc/source/conf.py b/doc/source/conf.py
index 17d8e70..c19fa93 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -25,9 +25,14 @@ extensions = [
     'sphinx.ext.autodoc',
     'sphinx.ext.viewcode',
     'sphinx.ext.doctest',
-    'oslosphinx',
+    'openstackdocstheme',
 ]
 
+# openstackdocstheme options
+repository_name = 'openstack/debtcollector'
+bug_project = 'debtcollector'
+bug_tag = 'doc'
+
 # 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
@@ -58,8 +63,11 @@ pygments_style = 'sphinx'
 # Sphinx are currently 'default' and 'sphinxdoc'.
 # html_theme_path = ["."]
 # html_theme = '_theme'
+html_theme = 'openstackdocs'
 # html_static_path = ['static']
 
+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 83e1a72..99c800b 100644
--- a/releasenotes/source/conf.py
+++ b/releasenotes/source/conf.py
@@ -35,10 +35,15 @@
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
 extensions = [
-    'oslosphinx',
+    'openstackdocstheme',
     'reno.sphinxext',
 ]
 
+# openstackdocstheme options
+repository_name = 'openstack/debtcollector'
+bug_project = 'debtcollector'
+bug_tag = 'doc'
+
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']
 
@@ -109,7 +114,7 @@ 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
@@ -147,7 +152,7 @@ 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 7a89ee3..de2cbc3 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -7,7 +7,7 @@ hacking<0.11,>=0.10.0
 coverage!=4.4,>=4.0 # Apache-2.0
 python-subunit>=0.0.18 # Apache-2.0/BSD
 sphinx>=1.6.2 # BSD
-oslosphinx>=4.7.0 # Apache-2.0
+openstackdocstheme>=1.11.0 # Apache-2.0
 testrepository>=0.0.18 # Apache-2.0/BSD
 testtools>=1.4.0 # MIT
 fixtures>=3.0.0 # Apache-2.0/BSD