diff --git a/setup.cfg b/setup.cfg
index 0a3d7a6c..e93c9f3f 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -42,7 +42,6 @@ check_untyped_defs = true
 disallow_any_generics = true
 disallow_incomplete_defs = true
 disallow_untyped_defs = true
-no_implicit_optional = true
 warn_redundant_casts = true
 warn_unused_ignores = true