diff --git a/cmd/cmd.go b/cmd/cmd.go
index 3a3febf..5b075fb 100644
--- a/cmd/cmd.go
+++ b/cmd/cmd.go
@@ -343,7 +343,7 @@ func New() *Cmd {
 				panic("secret-key not set.")
 			} else if bucket := c.String("bucket"); bucket == "" {
 				panic("bucket not set.")
-			} else if storage, err := server.NewS3Storage(accessKey, secretKey, bucket, c.String("s3-region"), c.String("s3-endpoint"), logger, c.Bool("s3-no-multipart"), c.Int64("s3-part-size"), c.Bool("s3-path-style")); err != nil {
+			} else if storage, err := server.NewS3Storage(accessKey, secretKey, bucket, c.String("s3-region"), c.String("s3-endpoint"), logger, c.Bool("s3-no-multipart"), c.Bool("s3-path-style")); err != nil {
 				panic(err)
 			} else {
 				options = append(options, server.UseStorage(storage))