diff --git a/include/ha.h b/include/ha.h
index e4345bb..3fd5cfb 100644
--- a/include/ha.h
+++ b/include/ha.h
@@ -42,7 +42,7 @@ namespace Ha {
             this->f = f;
         }
 
-        void buildConfig(JsonDocument& jsonDoc) {
+        void buildConfig(JsonDocument& jsonDoc) override {
             Component::buildConfig(jsonDoc);
             jsonDoc["command_topic"] = commandTopic;
         }
@@ -76,7 +76,7 @@ namespace Ha {
         Sensor(const char* name, const char* uniqueId, const char* topic) : Component(name, uniqueId, topic, "sensor") {
         }
 
-        void buildConfig(JsonDocument& jsonDoc) {
+        void buildConfig(JsonDocument& jsonDoc) override {
             Component::buildConfig(jsonDoc);
             jsonDoc["device_class"] = deviceClass;
             jsonDoc["unit_of_measurement"] = unitMeasure;
diff --git a/include/mqtt.h b/include/mqtt.h
index 8848560..900506c 100644
--- a/include/mqtt.h
+++ b/include/mqtt.h
@@ -86,10 +86,10 @@ namespace Mqtt {
     }
 
     void publishConfig() {
-        for (Ha::Component cmp : sensors) {
+        for (Ha::Component& cmp : sensors) {
             publishComponentConfig(cmp);
         }
-        for (Ha::Component cmp : switches) {
+        for (Ha::Component& cmp : switches) {
             publishComponentConfig(cmp);
         }
         ts.deleteTask(tPublishConfig);