diff --git a/.flowconfig b/.flowconfig
index 00740cac42..d613bab513 100644
--- a/.flowconfig
+++ b/.flowconfig
@@ -27,7 +27,6 @@ shells/dev/build/*
 [options]
 server.max_workers=4
 esproposal.class_instance_fields=enable
-esproposal.optional_chaining=enable
 suppress_comment=\\(.\\|\n\\)*\\$FlowFixMe
 suppress_comment=\\(.\\|\n\\)*\\$FlowIssue
 suppress_comment=\\(.\\|\n\\)*\\$FlowIgnore