diff --git a/app/controllers/jwt_controller.js b/app/controllers/jwt_controller.js
index 930f61b..ec2c5ba 100644
--- a/app/controllers/jwt_controller.js
+++ b/app/controllers/jwt_controller.js
@@ -10,8 +10,13 @@ module.exports.addMacValue= async(req, res, next)=>{
     try {
 
         const cryptr = new Cryptr('7B-q;Vn@oGc^aPtk:0QP/SyDoHw!,(L2{2uZP&jZw5l]*>s~,%Z+kaD1tloQU', { encoding: 'base64', pbkdf2Iterations: 10000, saltLength: 5 });
-        let {key, mac_id,  company_name, app_version , app_name} = req.body
-
+        app_name = null;
+        let {key, mac_id,  company_name, app_version } = req.body
+         if(req.body.hasOwnProperty('app_name')){
+            app_name = req.body.app_name;
+         }else{
+            app_name = null;
+         }
         key = cryptr.decrypt(key);
         mac_id = cryptr.decrypt(mac_id);
         company_name = cryptr.decrypt(company_name);