diff --git a/setup.cfg b/setup.cfg
index f63d35b7..4c22966b 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -103,9 +103,10 @@ setup-hooks =
 
 [build_sphinx]
 builders = html,man
+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