diff --git a/setup.cfg b/setup.cfg
index cbab8e8..327f043 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,9 @@
 [bdist_wheel]
 universal = 1
 
+[check]
+strict = 1
+
 [nosetests]
 cover-package = sprockets.mixins.metrics
 cover-branches = 1