diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3323077..c82a3c5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,9 +2,12 @@
 
 ## 2.1.0
 
+**New features:**
+* Added support for setting MQTT's keep alive ([https://github.com/dawidchyrzynski/arduino-home-assistant/issues/153](#153))
+
 **Fixes:**
-* Fixed a bug with the maximum number of device types (#190 by @martaisty)
-* Fixed compiler warning: `class 'HANumeric' is implicitly friends with itself` (#197 by @shedokan)
+* Fixed a bug with the maximum number of device types ([#190](https://github.com/dawidchyrzynski/arduino-home-assistant/issues/190) by [@martaisty](https://github.com/martaisty))
+* Fixed compiler warning: `class 'HANumeric' is implicitly friends with itself` ([#197](https://github.com/dawidchyrzynski/arduino-home-assistant/pull/197) by [@shedokan](https://github.com/shedokan))
 
 ## 2.0.0
 
diff --git a/src/HAMqtt.h b/src/HAMqtt.h
index 7819ff6..a607cca 100644
--- a/src/HAMqtt.h
+++ b/src/HAMqtt.h
@@ -202,9 +202,12 @@ public:
      * Returns true if connection to the MQTT broker is established.
      */
     bool isConnected() const;
-    
+
     /**
-     * sets keepAlive value.
+     * Sets keep alive for the MQTT connection.
+     * By default it's 15 seconds.
+     *
+    * @param keepAlive Number of seconds to keep connection alive.
      */
     void setKeepAlive(uint16_t keepAlive);