diff --git a/docs/source/conf.py b/docs/source/conf.py
index 2c2a0017..50ac2fa0 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -76,7 +76,7 @@ exclude_patterns = ['build', 'Thumbs.db', '.DS_Store']
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
 #
-html_theme = 'sphinx_rtd_theme'
+html_theme = 'sphinx_book_theme'
 html_theme_path = [sphinx_rtd_theme.get_html_theme_path()]
 html_theme_options = {}
 
diff --git a/requirements/docs.txt b/requirements/docs.txt
index 25373976..2436f5af 100644
--- a/requirements/docs.txt
+++ b/requirements/docs.txt
@@ -1,6 +1,7 @@
 docutils==0.16.0
 recommonmark
 sphinx==4.0.2
+sphinx-book-theme
 sphinx-copybutton
 sphinx_markdown_tables
 sphinx_rtd_theme==0.5.2