diff --git a/spec/proto/extension/v1/s3/oss.proto b/spec/proto/extension/v1/s3/oss.proto
index e31ebe11e5..2cfe5e66a1 100644
--- a/spec/proto/extension/v1/s3/oss.proto
+++ b/spec/proto/extension/v1/s3/oss.proto
@@ -8,6 +8,8 @@ package spec.proto.extension.v1.s3;
 import "google/protobuf/empty.proto";
 
 option go_package = "mosn.io/layotto/spec/proto/extension/v1/s3;s3";
+option java_outer_classname = "ObjectStorageProto";
+option java_package = "spec.proto.extension.v1.s3";
 
 /* @exclude quickstart generator */
 // ObjectStorageService is an abstraction for blob storage or so called "object storage", such as alibaba cloud OSS, such as AWS S3.