diff --git a/src/InverterSettings.cpp b/src/InverterSettings.cpp
index 7e7a5f8..4b5d52e 100644
--- a/src/InverterSettings.cpp
+++ b/src/InverterSettings.cpp
@@ -60,10 +60,10 @@ void InverterSettingsClass::init(Scheduler& scheduler)
 
         for (uint8_t i = 0; i < INV_MAX_COUNT; i++) {
             if (config.Inverter[i].Serial > 0) {
-                MessageOutput.print("  Adding inverter: ");
-                MessageOutput.print(config.Inverter[i].Serial, HEX);
-                MessageOutput.print(" - ");
-                MessageOutput.print(config.Inverter[i].Name);
+                MessageOutput.printf("  Adding inverter: %0" PRIx32 "%08" PRIx32 " - %s",
+                    static_cast<uint32_t>((config.Inverter[i].Serial >> 32) & 0xFFFFFFFF),
+                    static_cast<uint32_t>(config.Inverter[i].Serial & 0xFFFFFFFF),
+                    config.Inverter[i].Name);
                 auto inv = Hoymiles.addInverter(
                     config.Inverter[i].Name,
                     config.Inverter[i].Serial);
diff --git a/src/MqttSettings.cpp b/src/MqttSettings.cpp
index b86c51f..c547e0d 100644
--- a/src/MqttSettings.cpp
+++ b/src/MqttSettings.cpp
@@ -91,8 +91,7 @@ void MqttSettingsClass::onMqttDisconnect(espMqttClientTypes::DisconnectReason re
 
 void MqttSettingsClass::onMqttMessage(const espMqttClientTypes::MessageProperties& properties, const char* topic, const uint8_t* payload, const size_t len, const size_t index, const size_t total)
 {
-    MessageOutput.print("Received MQTT message on topic: ");
-    MessageOutput.println(topic);
+    MessageOutput.printf("Received MQTT message on topic: %s\r\n", topic);
 
     _mqttSubscribeParser.handle_message(properties, topic, payload, len, index, total);
 }