diff --git a/setup.cfg b/setup.cfg
index ceb02877af5..261ffec8f3c 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -96,7 +96,6 @@ mypy_path = src
 check_untyped_defs = True
 disallow_any_generics = True
 ignore_missing_imports = True
-no_implicit_optional = True
 show_error_codes = True
 strict_equality = True
 warn_redundant_casts = True