diff --git a/broker/broker.py b/broker/broker.py
index ae569af..b5b440a 100644
--- a/broker/broker.py
+++ b/broker/broker.py
@@ -105,7 +105,7 @@ def DropReplicaMessages(self, request, context):
     server = grpc.server(ThreadPoolExecutor(max_workers=10))
     broker = BrokerServer()
     broker_pb2_grpc.add_BrokerServicer_to_server(broker, server)
-    server.add_insecure_port(f'[::]:{os.environ["BROKER_PORT"]}')
+    server.add_insecure_port(f'0.0.0.0:{os.environ["BROKER_PORT"]}')
     server.start()
     channel = grpc.insecure_channel(f'{os.environ["ZOOKEEPER_HOST"]}:{os.environ["ZOOKEEPER_PORT"]}')
     stub = proto.zookeeper_pb2_grpc.ZookeeperStub(channel)
diff --git a/zookeeper/zookeeper.py b/zookeeper/zookeeper.py
index 9e78453..1d37659 100644
--- a/zookeeper/zookeeper.py
+++ b/zookeeper/zookeeper.py
@@ -67,6 +67,6 @@ def Register(self, request, context):
     manager = BrokerManager()
     message_pb2_grpc.add_MessageQueueServicer_to_server(MessageQueue(manager), server)
     zookeeper_pb2_grpc.add_ZookeeperServicer_to_server(Zookeeper(manager), server)
-    server.add_insecure_port(f"[::]:{os.getenv('ZOOKEEPER_PORT')}")
+    server.add_insecure_port(f"0.0.0.0:{os.getenv('ZOOKEEPER_PORT')}")
     server.start()
     server.wait_for_termination()