diff --git a/setup.cfg b/setup.cfg
index 5eb59aa..1367e5e 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -11,7 +11,6 @@ strict_optional = True
 no_implicit_optional = True
 check_untyped_defs = True
 disallow_incomplete_defs = True
-new_semantic_analyzer = True
 ignore_errors = False
 
 [mypy-runtests]