diff --git a/setup.cfg b/setup.cfg
index ab95cc0..dd0f9c9 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -56,7 +56,6 @@ 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