diff --git a/appPublic/zmq_topic.py b/appPublic/zmq_topic.py
index a7c18b2..2e22f45 100644
--- a/appPublic/zmq_topic.py
+++ b/appPublic/zmq_topic.py
@@ -67,6 +67,7 @@ class TopicPublisher:
 		self.url = "tcp://{}:{}".format(address, port)
 		self.pub = self.context.socket(zmq.PUB)
 		self.pub.connect(self.url)
+		time.sleep(0.5)
 
 	def send(self, message):
 		self.pub.send_multipart([self._topic, message.encode('utf-8')])
@@ -95,7 +96,11 @@ class TopicSubscriber:
 		self.sub = self.context.socket(zmq.SUB)
 		self.sub.connect(self.url)
 		# subscribe to topic 'en' or 'jp'
-		self.sub.setsockopt(zmq.SUBSCRIBE, self._topic)
+		if isinstance(self.topic, []):
+			for t in self.topic:
+				self.sub.setsockopt(zmq.SUBSCRIBE, t.encode('utf-8'))
+		else:
+			self.sub.setsockopt(zmq.SUBSCRIBE, self.topic.encode('utf-8')
 
 
 	def run(self):
diff --git a/doc/.zmq_topic.md.swp b/doc/.zmq_topic.md.swp
deleted file mode 100644
index 73d3c64..0000000
Binary files a/doc/.zmq_topic.md.swp and /dev/null differ