diff --git a/setup.cfg b/setup.cfg
index 07ab2d13..745b8e3d 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -33,9 +33,10 @@ tag_date = 0
 tag_svn_revision = 0
 
 [build_sphinx]
+all-files = 1
+warning-is-error = 1
 source-dir = doc/source
 build-dir = doc/build
-all_files = 1
 
 [upload_sphinx]
 upload-dir = doc/build/html