diff --git a/lib/package.js b/lib/package.js
index 014a9f8..5488964 100644
--- a/lib/package.js
+++ b/lib/package.js
@@ -66,7 +66,6 @@ const ar = require('ar-async'),
         this.excludeFiles = [];
         this.sign = null;
         this.certificate = null;
-        this.sign = "";
         this.certificate = "";
         this.appCount = 0;
         this.services = [];