diff --git a/src/communication.py b/src/communication.py
index 3b85478..f42083c 100644
--- a/src/communication.py
+++ b/src/communication.py
@@ -48,7 +48,7 @@ class ClusterCommunicationModule():
 
                 # send docker swarm token to the worker
                 token = self.node_manager.docker_client.swarm.attrs['JoinTokens']['Worker']
-                conn.send(f'[DOCKER_TOKEN] {token}'.encode())
+                conn.send(f'[DOCKER_TOKEN]  {token}'.encode())
                 print(f"Send token: {token} to the worker.")
                 print("Please Enter to continue...")
 
@@ -65,7 +65,7 @@ class ClusterCommunicationModule():
             self.client_sock.send('[CHECK]'.encode())
 
             # join docker swarm cluster
-            token = self.client_sock.recv(1024).decode().split()[-1]
+            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)
 
@@ -84,14 +84,14 @@ class ClusterCommunicationModule():
             return False
 
     def handle_command(self, data):
-        command, args = data.split()
+        command, args = data.split('  ')
         if command == '[INFO]':
             data = {'host': self.host, 'GPU': self.node_manager.GPU, 'GPU_num': self.node_manager.GPU_num}
             self.client_sock.send(json.dumps(data).encode())
         elif command == '[STOP]':
             self.node_manager.docker_client.swarm.leave()
             data = {'host': self.host}
-            self.client_sock.send(f'[STOP_CHECK] {json.dumps(data)}'.encode())
+            self.client_sock.send(f'[STOP_CHECK]  {json.dumps(data)}'.encode())
 
         return True
 
@@ -119,7 +119,7 @@ class ClusterCommunicationModule():
         ans = []
         for conn in self.worker_conns:
             try:
-                conn.send('[INFO] {}'.encode())
+                conn.send('[INFO]  {}'.encode())
                 data = conn.recv(1024)
                 data = json.loads(data.decode())
                 ans.append(data)
@@ -131,8 +131,8 @@ class ClusterCommunicationModule():
     def exit(self):
         if self.node_manager.status == 'master':
             for conn in self.worker_conns:
-                conn.send('[STOP] {}'.encode())
-                check, args = conn.recv(1024).decode().split()
+                conn.send('[STOP]  {}'.encode())
+                check, args = conn.recv(1024).decode().split('  ')
                 print(f'{args} has stopped.')
             self.node_manager.docker_client.swarm.leave(force=True)