diff --git a/back-end/mqtt/subscriber.js b/back-end/mqtt/subscriber.js
index e49679e..b39e867 100644
--- a/back-end/mqtt/subscriber.js
+++ b/back-end/mqtt/subscriber.js
@@ -1,9 +1,7 @@
 const mqtt = require('mqtt');
-require('dotenv').config();
-const CONFIG = require('../../config.json');
 
-const brokerHost = CONFIG.mosquitto.host;
-const brokerPort = CONFIG.mosquitto.port;
+const brokerHost = 'mosquitto';
+const brokerPort = 1883;
 
 const {     
     ch_temperature,
diff --git a/front-end/src/components/charts/DoughnutChart.js b/front-end/src/components/charts/DoughnutChart.js
index c2262b9..2780a18 100644
--- a/front-end/src/components/charts/DoughnutChart.js
+++ b/front-end/src/components/charts/DoughnutChart.js
@@ -2,10 +2,9 @@ import { Doughnut } from 'react-chartjs-2';
 import axios from 'axios';
 import { Chart as ChartJS, ArcElement, Legend, Tooltip, plugins } from "chart.js";
 import { useEffect, useState } from 'react';
-const CONFIG = require('../../../../config.json');
 
-const backEndHost = CONFIG["back-end"].host;
-const backEndPort = CONFIG["back-end"].port;
+const backEndHost = 'back-end';
+const backEndPort = 3000;
 
 ChartJS.register(
   ArcElement,