diff --git a/03-di/01-notification-service/logger/logger.interface.ts b/03-di/01-notification-service/logger/logger.interface.ts
deleted file mode 100644
index f6c3491..0000000
--- a/03-di/01-notification-service/logger/logger.interface.ts
+++ /dev/null
@@ -1,9 +0,0 @@
-export interface ILoggerService {
-    senderEmail(data: string): void;
-    smsGateway(data: string): void;
-}
-
-export enum LogPath {
-    emails = 'emails',
-    sms = 'sms',
-}
diff --git a/03-di/01-notification-service/logger/logger.service.ts b/03-di/01-notification-service/logger/logger.service.ts
index 3750236..b2c8ea9 100644
--- a/03-di/01-notification-service/logger/logger.service.ts
+++ b/03-di/01-notification-service/logger/logger.service.ts
@@ -1,12 +1,21 @@
 import { Injectable } from "@nestjs/common";
 import { appendFile } from "node:fs/promises";
-import { ILoggerService, LogPath } from "./Logger.interface";
 
 const emailsLogPath = require('path').join(__dirname, '..', '..', 'test', 'emails.txt');
 const smsLogPath = require('path').join(__dirname, '..', '..', 'logs', 'sms.txt');
 const errorsLogPath =  require('path').join(__dirname, '..', '..', 'logs', 'errors.txt');
 const newLineChar = process.platform === 'win32' ? '\r\n' : '\n';
 
+interface ILoggerService {
+    senderEmail(data: string): void;
+    smsGateway(data: string): void;
+}
+
+enum LogPath {
+    emails = 'emails',
+    sms = 'sms',
+}
+
 @Injectable()
 export class LoggerService implements ILoggerService {
     public async senderEmail(data: string) {