diff --git a/lib/framework/MqttSettingsService.h b/lib/framework/MqttSettingsService.h
index 21ec908bd..cac21aa86 100644
--- a/lib/framework/MqttSettingsService.h
+++ b/lib/framework/MqttSettingsService.h
@@ -58,7 +58,7 @@ static String generateClientId() {
 #endif
 
 #ifndef FACTORY_MQTT_MULTIPLE_INSTANCES
-#define FACTORY_MQTT_MULTIPLE_INSTANCES false
+#define FACTORY_MQTT_MULTIPLE_INSTANCES true
 #endif
 
 class MqttSettings {
diff --git a/mock-api/server.js b/mock-api/server.js
index f73d04026..e2d06fef9 100644
--- a/mock-api/server.js
+++ b/mock-api/server.js
@@ -223,7 +223,7 @@ mqtt_settings = {
   client_id: 'ems-esp',
   keep_alive: 60,
   clean_session: true,
-  multiple_instances: false,
+  multiple_instances: true,
   publish_time_boiler: 10,
   publish_time_thermostat: 10,
   publish_time_solar: 10,