diff --git a/setup.cfg b/setup.cfg
index 17d549162..d1b23cf7a 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -28,6 +28,7 @@ disallow_untyped_defs = True
 disallow_untyped_decorators = True
 disallow_untyped_calls = True
 disallow_incomplete_defs = True
+strict = True
 no_implicit_reexport = True
 
 [mypy-conf]