diff --git a/releasenotes/source/conf.py b/releasenotes/source/conf.py
index beb9a2a..c7c499e 100644
--- a/releasenotes/source/conf.py
+++ b/releasenotes/source/conf.py
@@ -35,8 +35,8 @@
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
 extensions = [
-    'oslosphinx',
     'reno.sphinxext',
+    'openstackdocstheme',
 ]
 
 # Add any paths that contain templates here, relative to this directory.
@@ -109,7 +109,7 @@ 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
@@ -148,6 +148,7 @@ 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 404d2bc..508a411 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -10,4 +10,3 @@ sphinx!=1.6.1,>=1.5.1 # BSD
 reno!=2.3.1,>=1.8.0 # Apache-2.0
 
 os-api-ref>=1.0.0 # Apache-2.0
-oslosphinx>=4.7.0 # Apache-2.0