diff --git a/examples/tinymqtt-test/tinymqtt-test.ino b/examples/tinymqtt-test/tinymqtt-test.ino
index 3c5fb93..d4f25b7 100644
--- a/examples/tinymqtt-test/tinymqtt-test.ino
+++ b/examples/tinymqtt-test/tinymqtt-test.ino
@@ -1,6 +1,13 @@
 #include <TinyMqtt.h>       // https://github.com/hsaturn/TinyMqtt
 #include <MqttStreaming.h>
-#include <ESP8266mDNS.h>
+#if defined(ESP8266)
+  #include <ESP8266mDNS.h>
+#elif defined(ESP32)
+  #include <ESPmDNS.h>
+#else
+  #error Unsupported platform
+#endif
+#include <ESPmDNS.h>
 
 #include <sstream>
 #include <map>
@@ -11,6 +18,7 @@
 	* Upload the sketch, the use the terminal.
 	* Press H for mini help.
 	*
+  * tested with mqtt-spy-0.5.4
 	* TODO examples of scripts
   */
 
@@ -715,7 +723,9 @@ void loop()
 	}
 
 	static long count;
+  #if defined(ESP9266)
   MDNS.update();
+  #endif
 
 	if (MqttClient::counter != count)
 	{
diff --git a/library.json b/library.json
index b17956e..d886691 100644
--- a/library.json
+++ b/library.json
@@ -1,12 +1,12 @@
 {
     "name": "TinyMqtt",
     "keywords": "ethernet, mqtt, m2m, iot",
-    "description": "MQTT is a lightweight messaging protocol ideal for small devices. This library allows to send and receive MQTT messages. It does support MQTT 3.1.1 with QOS=0.",
+    "description": "MQTT is a lightweight messaging protocol ideal for small devices. This library allows to send and receive and host a broker for MQTT. It does support MQTT 3.1.1 with QOS=0 on ESP8266 and ESP32 WROOM platfrms.",
     "repository": {
         "type": "git",
         "url": "https://github.com/hsaturn/TinyMqtt.git"
     },
-    "version": "0.7.3",
+    "version": "0.7.4",
     "exclude": "",
     "examples": "examples/*/*.ino",
     "frameworks": "arduino",
diff --git a/library.properties b/library.properties
index fc85179..5505329 100644
--- a/library.properties
+++ b/library.properties
@@ -1,9 +1,9 @@
 name=TinyMqtt
-version=0.7.3
+version=0.7.4
 author=Francois BIOT, HSaturn, <hsaturn@gmail.com>
 maintainer=Francois BIOT, HSaturn, <hsaturn@gmail.com>
 sentence=A tiny broker and client library for MQTT messaging.
-paragraph=MQTT is a lightweight messaging protocol ideal for small devices. This library allows to send and receive MQTT messages and to host a broker in your ESP. It does support MQTT 3.1.1 with QoS=0.
+paragraph=MQTT is a lightweight messaging protocol ideal for small devices. This library allows to send and receive MQTT messages and to host a broker in your ESP 8266 and 32 WROOM. It does support MQTT 3.1.1 with QoS=0.
 category=Communication
 url=https://github.com/hsaturn/TinyMqtt
 architectures=*