diff --git a/lib/extension/bridge.ts b/lib/extension/bridge.ts
index 6e4dd213dd..0471689ed1 100644
--- a/lib/extension/bridge.ts
+++ b/lib/extension/bridge.ts
@@ -69,7 +69,7 @@ export default class Bridge extends Extension {
 
         if (debugToMQTTFrontend) {
             class DebugEventTransport extends Transport {
-                log(info: {message: string; level: string; namespace: string}, next: () => void): void {
+                override log(info: {message: string; level: string; namespace: string}, next: () => void): void {
                     bridgeLogging(info.message, info.level, info.namespace);
                     next();
                 }
@@ -78,7 +78,7 @@ export default class Bridge extends Extension {
             this.logTransport = new DebugEventTransport();
         } else {
             class EventTransport extends Transport {
-                log(info: {message: string; level: string; namespace: string}, next: () => void): void {
+                override log(info: {message: string; level: string; namespace: string}, next: () => void): void {
                     if (info.level !== 'debug') {
                         bridgeLogging(info.message, info.level, info.namespace);
                     }
diff --git a/lib/extension/publish.ts b/lib/extension/publish.ts
index 3bb83b8bb4..a1ff62e244 100644
--- a/lib/extension/publish.ts
+++ b/lib/extension/publish.ts
@@ -28,7 +28,7 @@ interface ParsedTopic {
 }
 
 export default class Publish extends Extension {
-    async start(): Promise<void> {
+    override async start(): Promise<void> {
         this.eventBus.onMQTTMessage(this, this.onMQTTMessage);
     }
 
diff --git a/lib/extension/receive.ts b/lib/extension/receive.ts
index 5cb3584e86..9982f20158 100755
--- a/lib/extension/receive.ts
+++ b/lib/extension/receive.ts
@@ -19,7 +19,7 @@ export default class Receive extends Extension {
     private debouncers: {[s: string]: {payload: KeyValue; publish: DebounceFunction}} = {};
     private throttlers: {[s: string]: {publish: PublishEntityState}} = {};
 
-    async start(): Promise<void> {
+    override async start(): Promise<void> {
         this.eventBus.onPublishEntityState(this, this.onPublishEntityState);
         this.eventBus.onDeviceMessage(this, this.onDeviceMessage);
     }