diff --git a/doc/ref_impl/cntt-ri/.readthedocs.yaml b/doc/ref_impl/cntt-ri/.readthedocs.yaml
new file mode 100644
index 0000000000..ebb3eebe13
--- /dev/null
+++ b/doc/ref_impl/cntt-ri/.readthedocs.yaml
@@ -0,0 +1,15 @@
+version: 2
+
+build:
+  os: "ubuntu-22.04"
+  tools:
+    python: "3.10"
+
+# Build from the root directory with Sphinx
+sphinx:
+  configuration: conf.py
+
+# Explicitly set the version of Python and its requirements
+python:
+  install:
+    - requirements: test-requirements.txt
\ No newline at end of file
diff --git a/doc/ref_impl/cntt-ri/_static/anuket-logo.png b/doc/ref_impl/cntt-ri/_static/anuket-logo.png
new file mode 100644
index 0000000000..fe256a64a4
Binary files /dev/null and b/doc/ref_impl/cntt-ri/_static/anuket-logo.png differ
diff --git a/doc/ref_impl/cntt-ri/_static/custom.css b/doc/ref_impl/cntt-ri/_static/custom.css
new file mode 100644
index 0000000000..46c9616178
--- /dev/null
+++ b/doc/ref_impl/cntt-ri/_static/custom.css
@@ -0,0 +1,66 @@
+/* Changing the color of top navbar in piccolo */
+div#top_nav nav {
+    background-color: #16326c;
+    padding:0.5rem;
+}
+
+/* Changing the size of the logo in the top navbar in piccolo */
+div#top_nav nav h1 img {
+	height: 2rem;
+}
+
+/* Changing the margin of the main text in piccolo */
+div.document {
+	margin-left: 10rem;
+	margin-right: 20rem;
+}
+
+/* Changing link color in piccolo */
+a {
+	color: #007574ff;
+}
+
+/* Changing link color in the left sidebar in piccolo */
+div.sphinxsidebar ul li a.current {
+	color: #007574ff;
+}
+
+/* Changing the hover color in the left sidebar in piccolo */
+div.sphinxsidebar ul li a:hover {
+	color: #007574ff;
+}
+
+/* Changing the hover color in the right sidebar in piccolo */
+div#right_sidebar ul li a:hover {
+	color: #007574ff;
+}
+
+/* Changing the color of the > icon next to Page contents */
+div#right_sidebar p span.icon {
+	color: #007574ff;
+}
+
+/* Changing the color of the Page contents title */
+div#right_sidebar p span {
+	color: #007574ff;
+}
+
+/* Changing the color of the search button */
+div.document form input[type=submit], div.document form button {
+	background-color: #16326c;
+}
+
+/* Changing the color of the Search text in the Search button */
+div#searchbox form.search input[type="submit"] {
+	color: #16326c;
+}
+
+/* Changing the color of the > icon next to the collapsed Page contents */
+div#show_right_sidebar p span.icon {
+	color: rgba(0, 0, 0, 0.6);
+}
+
+/* Removing option to switch to dark mode */
+div#top_nav nav a#mode_toggle, div#top_nav nav a#source_link {
+	display: none;
+}
\ No newline at end of file
diff --git a/doc/ref_impl/cntt-ri/_static/favicon.ico b/doc/ref_impl/cntt-ri/_static/favicon.ico
new file mode 100644
index 0000000000..3d410f6e95
Binary files /dev/null and b/doc/ref_impl/cntt-ri/_static/favicon.ico differ
diff --git a/doc/ref_impl/cntt-ri/conf.py b/doc/ref_impl/cntt-ri/conf.py
index c072976d6d..7045b6a320 100644
--- a/doc/ref_impl/cntt-ri/conf.py
+++ b/doc/ref_impl/cntt-ri/conf.py
@@ -10,6 +10,10 @@
     'sphinx.ext.intersphinx',
     'sphinx.ext.autosectionlabel'
 ]
+
+html_theme = "piccolo_theme"
+
+
 linkcheck_ignore = [
     'http://127.0.0.1',
     'https://trex-tgn.cisco.com',
@@ -20,8 +24,8 @@
     'http://artifacts.opnfv.org/',
     'https://build.opnfv.org/', 
     'https://wiki.lfnetworking.org/'
-
 ]
+
 intersphinx_mapping = {
     'cntt': ('https://cntt.readthedocs.io/en/latest/', None),
     'ref_model': ('https://cntt.readthedocs.io/projects/rm/en/latest/', None),
@@ -32,3 +36,22 @@
 numfig = True
 numfig_format = {'figure': 'Figure %s', 'table': 'Table %s',
                  'code-block': 'Listing %s', 'section': 'Section %s'}
+
+html_static_path = ['_static']
+templates_path = ['_templates']
+
+html_css_files = [
+    'custom.css',
+]
+
+html_show_sourcelink = False
+html_theme_options = {
+    # If False, expand all TOC entries
+    'globaltoc_collapse': False,
+    # If True, show hidden TOC entries
+    'globaltoc_includehidden': False,
+}
+
+# Inverse png
+html_logo = '_static/anuket-logo.png'
+html_favicon = '_static/favicon.ico'
\ No newline at end of file
diff --git a/doc/ref_impl/cntt-ri/test-requirements.txt b/doc/ref_impl/cntt-ri/test-requirements.txt
index b57257cc14..3bd0893c61 100644
--- a/doc/ref_impl/cntt-ri/test-requirements.txt
+++ b/doc/ref_impl/cntt-ri/test-requirements.txt
@@ -1,4 +1,3 @@
-sphinx!=1.6.6,!=1.6.7,!=2.1.0,!=3.0.0,!=3.4.2
-sphinx-rtd-theme
-doc8
-sphinx_material
+sphinx==4.5.0 # BSD
+doc8==0.11.2 # Apache-2.0
+piccolo-theme==0.16.0 # MIT