diff --git a/demo/mqttv5_scram/mqttv5_scram.c b/demo/mqttv5_scram/mqttv5_scram.c
index 2609ea4b..5b03df31 100644
--- a/demo/mqttv5_scram/mqttv5_scram.c
+++ b/demo/mqttv5_scram/mqttv5_scram.c
@@ -560,6 +560,28 @@ main(const int argc, const char **argv)
 			nng_thread_create(&threads[i], publish_cb, &params);
 		}
 
+		for (i = 0; i < nthread; i++) {
+			nng_thread_destroy(threads[i]);
+		}
+	} else if (strcmp(TLS_PUBLISH, cmd) == 0) {
+		const char *data     = argv[5];
+		uint32_t    interval = 0;
+		uint32_t    nthread  = 1;
+
+		nng_thread *threads[nthread];
+
+		params.sock = &sock, params.topic = topic;
+		params.data     = (uint8_t *) data;
+		params.data_len = strlen(data);
+		params.qos      = qos;
+		params.interval = interval;
+		params.verbose  = verbose;
+
+		size_t i = 0;
+		for (i = 0; i < nthread; i++) {
+			nng_thread_create(&threads[i], publish_cb, &params);
+		}
+
 		for (i = 0; i < nthread; i++) {
 			nng_thread_destroy(threads[i]);
 		}
@@ -567,9 +589,64 @@ main(const int argc, const char **argv)
 		nng_mqtt_topic_qos subscriptions[] = {
 			{
 			    .qos   = qos,
-			    .topic = { 
+			    .topic = {
+					.buf    = (uint8_t *) topic,
+			        .length = strlen(topic),
+				},
+				.nolocal         = 1,
+				.rap             = 1,
+				.retain_handling = 0,
+			},
+		};
+		nng_mqtt_topic unsubscriptions[] = {
+			{
+			    .buf    = (uint8_t *) topic,
+			    .length = strlen(topic),
+			},
+		};
+
+		property *plist = mqtt_property_alloc();
+		mqtt_property_append(plist,
+		    mqtt_property_set_value_varint(
+		        SUBSCRIPTION_IDENTIFIER, 120));
+		property *unsub_plist = NULL;
+		mqtt_property_dup(&unsub_plist, plist);
+
+		// Sync subscription
+		// rv = nng_mqtt_subscribe(sock, subscriptions, 1, plist);
+
+		// Asynchronous subscription
+		nng_mqtt_client *client = nng_mqtt_client_alloc(sock, &send_callback, NULL, true);
+		nng_mqtt_subscribe_async(client, subscriptions,
+		    sizeof(subscriptions) / sizeof(nng_mqtt_topic_qos), plist);
+
+		printf("Start receiving loop:\n");
+		while (true) {
+			nng_msg *msg;
+			if ((rv = nng_recvmsg(sock, &msg, 0)) != 0) {
+				fatal("nng_recvmsg", rv);
+				continue;
+			}
+
+			// we should only receive publish messages
+			assert(nng_mqtt_msg_get_packet_type(msg) == NNG_MQTT_PUBLISH);
+			msg_recv_deal(msg, verbose);
+		}
+
+		// Sync unsubscription
+		// rv = nng_mqtt_unsubscribe(sock, subscriptions, 1, plist);
+		// Asynchronous unsubscription
+		nng_mqtt_unsubscribe_async(client, unsubscriptions,
+		    sizeof(unsubscriptions) / sizeof(nng_mqtt_topic),
+		    unsub_plist);
+		nng_mqtt_client_free(client, true);
+	} else if (strcmp(TLS_SUBSCRIBE, cmd) == 0) {
+		nng_mqtt_topic_qos subscriptions[] = {
+			{
+			    .qos   = qos,
+			    .topic = {
 					.buf    = (uint8_t *) topic,
-			        .length = strlen(topic), 
+			        .length = strlen(topic),
 				},
 				.nolocal         = 1,
 				.rap             = 1,
@@ -620,7 +697,7 @@ main(const int argc, const char **argv)
 		nng_mqtt_client_free(client, true);
 	}
 
-	// disconnect 
+	// disconnect
 	property *plist = mqtt_property_alloc();
 	property *p     = mqtt_property_set_value_strpair(
             USER_PROPERTY, "aaa", strlen("aaa"), "aaa", strlen("aaa"), true);