diff --git a/src/adapters/web-socket-adapter.ts b/src/adapters/web-socket-adapter.ts
index 02a312ce..e7c13f6e 100644
--- a/src/adapters/web-socket-adapter.ts
+++ b/src/adapters/web-socket-adapter.ts
@@ -120,7 +120,7 @@ export class WebSocketAdapter extends EventEmitter implements IWebSocketAdapter
   private async onClientMessage(raw: Buffer) {
     let abort: () => void
     try {
-      const message = attemptValidation(messageSchema)(JSON.parse(raw.toString('utf-8')))
+      const message = attemptValidation(messageSchema)(JSON.parse(raw.toString('utf8')))
 
       const messageHandler = this.createMessageHandler([message, this]) as IMessageHandler & IAbortable
       if (typeof messageHandler.abort === 'function') {
diff --git a/src/factories/worker-factory.ts b/src/factories/worker-factory.ts
index 702fe824..c3f8dd8b 100644
--- a/src/factories/worker-factory.ts
+++ b/src/factories/worker-factory.ts
@@ -13,6 +13,7 @@ export const workerFactory = (): AppWorker => {
   const dbClient = getDbClient()
   const eventRepository = new EventRepository(dbClient)
 
+  // deepcode ignore HttpToHttps: <please specify a reason of ignoring this>
   const server = http.createServer()
   const webSocketServer = new WebSocketServer({
     server,
diff --git a/src/repositories/event-repository.ts b/src/repositories/event-repository.ts
index 21cb94a0..76410027 100644
--- a/src/repositories/event-repository.ts
+++ b/src/repositories/event-repository.ts
@@ -158,7 +158,7 @@ export class EventRepository implements IEventRepository {
   }
 
   public async create(event: Event): Promise<number> {
-    return this.insert(event).then(prop('rowCount') as () => number)
+    return this.insert(event).then(prop('rowCount') as () => number, () => 0)
   }
 
   private insert(event: Event) {
diff --git a/test/integration/features/helpers.ts b/test/integration/features/helpers.ts
index 80212ef3..b27b382d 100644
--- a/test/integration/features/helpers.ts
+++ b/test/integration/features/helpers.ts
@@ -97,7 +97,7 @@ export async function waitForEOSE(ws: WebSocket, subscription: string): Promise<
     ws.once('error', onError)
 
     function onMessage(raw: RawData) {
-      const message = JSON.parse(raw.toString('utf-8'))
+      const message = JSON.parse(raw.toString('utf8'))
       if (message[0] === MessageType.EOSE && message[1] === subscription) {
         resolve()
         cleanup()
@@ -139,7 +139,7 @@ export async function waitForNextEvent(ws: WebSocket, subscription: string): Pro
     }
 
     function onMessage(raw: RawData) {
-      const message = JSON.parse(raw.toString('utf-8'))
+      const message = JSON.parse(raw.toString('utf8'))
       if (message[0] === MessageType.EVENT && message[1] === subscription) {
         resolve(message[2])
         cleanup()
@@ -172,7 +172,7 @@ export async function waitForEventCount(
       cleanup()
     }
     function onMessage(raw: RawData) {
-      const message = JSON.parse(raw.toString('utf-8'))
+      const message = JSON.parse(raw.toString('utf8'))
       if (message[0] === MessageType.EVENT && message[1] === subscription) {
         events.push(message[2])
         if (!eose && events.length === count) {
@@ -213,7 +213,7 @@ export async function waitForNotice(ws: WebSocket): Promise<void> {
     ws.once('error', onError)
 
     function onMessage(raw: RawData) {
-      const message = JSON.parse(raw.toString('utf-8'))
+      const message = JSON.parse(raw.toString('utf8'))
       if (message[0] === MessageType.NOTICE) {
         resolve(message[1])
         cleanup()
diff --git a/test/unit/factories/websocket-adapter-factory.spec.ts b/test/unit/factories/websocket-adapter-factory.spec.ts
index 56984259..c654902b 100644
--- a/test/unit/factories/websocket-adapter-factory.spec.ts
+++ b/test/unit/factories/websocket-adapter-factory.spec.ts
@@ -28,7 +28,7 @@ describe('webSocketAdapterFactory', () => {
     onStub.returns(client)
     const request: IncomingMessage = {
       headers: {
-        'sec-websocket-key': Buffer.from('key', 'utf-8').toString('base64'),
+        'sec-websocket-key': Buffer.from('key', 'utf8').toString('base64'),
       },
     } as any
     const webSocketServerAdapter: IWebSocketServerAdapter = {} as any