diff --git a/src/communication.py b/src/communication.py
index 4d3e9ad..e6788fc 100644
--- a/src/communication.py
+++ b/src/communication.py
@@ -48,7 +48,6 @@ class ClusterCommunicationModule():
                 token = self.node_manager.docker_client.swarm.attrs['JoinTokens']['Worker']
                 conn.send(f'[DOCKER_TOKEN] {token}'.encode())
                 print(f"Send token: {token} to the worker.")
-                time.sleep(3)
 
                 self.worker_conns.append(conn)
                 continue
@@ -63,8 +62,12 @@ class ClusterCommunicationModule():
             self.client_sock.send('[CHECK]'.encode())
 
             # join docker swarm cluster
-            docker_token = self.client_sock.recv(1024).decode().split()[-1]
-            print("Receive Docker Swarm Join_Token=", docker_token)
+            token = self.client_sock.recv(1024).decode().split()[-1]
+            print("Receive Docker Swarm Join_Token=", token)
+            status = self.node_manager.docker_client.swarm.join(remote_addrs=[f'{addr[0]}:2377'], join_token=token)
+
+            if not status:
+                print("Some Errors!")
 
             # remove 'add node'
             self.node_manager.actions = self.node_manager.actions[1:]