diff --git a/api/server.js b/api/server.js
index 0b7490c..73244bd 100644
--- a/api/server.js
+++ b/api/server.js
@@ -16,6 +16,12 @@ const cors = require('cors');
 const mongoose = require('mongoose');
 const {exec} = require('child_process');
 
+// cluster mode
+const cluster = require('cluster');
+const envWorkerNum = process.env.NODE_WORKER_COUNT;
+const cpuCount = require('os').cpus().length;
+const numWorkers = (envWorkerNum && envWorkerNum < cpuCount) ? envWorkerNum : cpuCount;
+
 // own modules
 const config = require('./config/config');
 const urls = require('./config/api-url');
@@ -108,7 +114,7 @@ if (process.env.NODE_ENV === config.test.unit.env || process.env.NODE_ENV === co
   const mongoServer = new MongodbMemoryServer();
   mongoose.Promise = Promise;
   mongoServer.getConnectionString().then((mongoUri) => {
-    mongoose.connect(mongoUri);
+    mongoose.connect(mongoUri, { useNewUrlParser: true });
 
     mongoose.connection.on('error', (e) => {
       if (e.message.code === 'ETIMEDOUT') {
@@ -139,17 +145,29 @@ if (process.env.NODE_ENV === config.test.unit.env || process.env.NODE_ENV === co
     });
   });
 } else {
-  const mongoosePromise = mongoose.connect(config.database.uri + config.database.db);
-  mongoosePromise.then((db) => {
-    app.listen(config.port, (err) => {
-      if (err !== undefined) {
-        error('Error on startup, ', err);
-      } else {
-        logger('Listening on port ' + config.port);
-        signatureCronJob.start();
-        backupCronJob.start();
+  mongoose.connect(config.database.uri + config.database.db, {useNewUrlParser: true}).then((db) => {
+    if (cluster.isMaster) {
+      // Fork workers
+      for (let i = 0; i < numWorkers; i++) {
+        cluster.fork();
       }
-    });
+      logger(`Master ${process.pid} is running. Forking ${numWorkers} workers`);
+
+      //Check if worker id is died
+      cluster.on('exit', (worker, code, signal) => {
+        logger(`worker ${worker.process.pid} died`);
+      });
+    } else {
+      app.listen(config.port, (err) => {
+        if (err !== undefined) {
+          error(`Error on startup ${err}`);
+        } else {
+          logger(`Worker ${process.pid} started. Listening on port ${config.port}`);
+          signatureCronJob.start();
+          backupCronJob.start();
+        }
+      });
+    }
   });
 }