diff --git a/docs/_static/css/custom_style.css b/docs/_static/css/custom_style.css
index 00a18c9..579fe07 100644
--- a/docs/_static/css/custom_style.css
+++ b/docs/_static/css/custom_style.css
@@ -1,3 +1,3 @@
 .wy-nav-content {
-    max-width: 1200px !important;
+    max-width: none;
 }
\ No newline at end of file
diff --git a/docs/conf.py b/docs/conf.py
index e47ca81..f0760ba 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -1,5 +1,5 @@
 import pkg_resources
-import sphinx_rtd_theme
+import sphinx_book_theme
 
 # Configuration file for the Sphinx documentation builder.
 #
@@ -90,12 +90,10 @@ todo_include_todos = True
 # 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_path = [sphinx_rtd_theme.get_html_theme_path()]
+html_theme = "sphinx_book_theme"
+html_theme_path = [sphinx_book_theme.get_html_theme_path()]
 html_theme_options = {
-    "logo_only": True,
     "collapse_navigation": False,
-    "display_version": False,
     "navigation_depth": 4,
 }
 
@@ -111,21 +109,6 @@ html_css_files = [
     'css/custom_style.css',
 ]
 
-# Custom sidebar templates, must be a dictionary that maps document names
-# to template names.
-#
-# This is required for the alabaster theme
-# refs: http://alabaster.readthedocs.io/en/latest/installation.html#sidebars
-html_sidebars = {
-    "**": [
-        "about.html",
-        "navigation.html",
-        "relations.html",  # needs 'show_related': True theme option to display
-        "searchbox.html",
-    ]
-}
-
-
 # -- Options for HTMLHelp output ------------------------------------------
 
 # Output file base name for HTML help builder.
diff --git a/setup.py b/setup.py
index ebf8e99..ad35bb4 100644
--- a/setup.py
+++ b/setup.py
@@ -57,7 +57,7 @@ REQUIRED = [
 DEV_REQUIRED = [
     # For documentations
     "sphinx",
-    "sphinx_rtd_theme",
+    "sphinx_book_theme",
     # CI dependencies
     "pytest>=3",
     "wheel",