diff --git a/coreapi/help/doc/sphinx/conf.py.in b/coreapi/help/doc/sphinx/conf.py.in
index 7deb8b4fd..89b2a4937 100644
--- a/coreapi/help/doc/sphinx/conf.py.in
+++ b/coreapi/help/doc/sphinx/conf.py.in
@@ -103,6 +103,8 @@ html_static_path = ['_static']
 # Path to the picture to use as logo.
 html_logo = 'logo.png'
 
+# Enable html5
+html_experimental_html5_writer = True
 
 # -- Options for HTMLHelp output ------------------------------------------