diff --git a/setup.cfg b/setup.cfg
index d68c77d8ef..514c3c247a 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -32,7 +32,8 @@ packages =
     openstack_dashboard
 
 [build_sphinx]
-all_files = 1
+all-files = 1
+warning-is-error = 1
 build-dir = doc/build
 source-dir = doc/source