diff --git a/doc/conf.py b/doc/conf.py
index bbb90390..015d1a5e 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -137,6 +137,10 @@
 
 html_favicon = 'favicon.svg'
 html_title = project + ' version ' + release
+html_theme = 'shibuya'
+html_theme_options = {
+    'navigation_with_keys': True,
+}
 
 # -- Options for LaTeX output ---------------------------------------------
 
diff --git a/doc/requirements.txt b/doc/requirements.txt
index 3c83291b..28539d4f 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -1,3 +1,4 @@
+shibuya
 ipykernel
 numpy
 matplotlib