diff --git a/categories/message-queue.md b/categories/message-queue.md
index 8d3bdd5..fd2be54 100644
--- a/categories/message-queue.md
+++ b/categories/message-queue.md
@@ -1,7 +1,12 @@
-# Rabbitmq
+# Message Queue
+## Rabbitmq
 
-# activeMQ
+## activeMQ
 
-# Redis
+## Redis
 
-# Kafka
+## Kafka
+
+# MQTT
+
+A lightweight messaging protocol for small sensors and mobile devices, optimized for high-latency or unreliable networks. It's basically a machine-to-machine `protocol`