diff --git a/option/simple.go b/option/simple.go
index 52c1e4bd..fba5c9f2 100644
--- a/option/simple.go
+++ b/option/simple.go
@@ -30,5 +30,5 @@ type HTTPOutboundOptions struct {
 	Username string              `json:"username,omitempty"`
 	Password string              `json:"password,omitempty"`
 	TLS      *OutboundTLSOptions `json:"tls,omitempty"`
-	Header   map[string]string   `json:"header,omitempty"`
+	Header   map[string]string   `json:"headers,omitempty"`
 }