diff --git a/libs/ng2-file-upload/file-upload/file-uploader.class.ts b/libs/ng2-file-upload/file-upload/file-uploader.class.ts
index a4940bb4..21b89fe7 100644
--- a/libs/ng2-file-upload/file-upload/file-uploader.class.ts
+++ b/libs/ng2-file-upload/file-upload/file-uploader.class.ts
@@ -31,7 +31,7 @@ export interface FileUploaderOptions {
   maxFileSize?: number;
   queueLimit?: number;
   removeAfterUpload?: boolean;
-  url: string;
+  url?: string;
   disableMultipart?: boolean;
   itemAlias?: string;
   authTokenHeader?: string;