diff --git a/bucket/option/put.go b/bucket/option/put.go
index <HASH>..<HASH> 100644
--- a/bucket/option/put.go
+++ b/bucket/option/put.go
@@ -13,6 +13,7 @@ type PutObjectInput func(req *s3.PutObjectInput)
 func SSEKMSKeyID(keyID string) PutObjectInput {
 	return func(req *s3.PutObjectInput) {
 		req.SSEKMSKeyId = aws.String(keyID)
+		req.ServerSideEncryption = aws.String("aws:kms")
 	}
 }
bucket: Set ServerSideEncryption = "aws:kms"