diff --git a/api/src/controller/http/middleware.ts b/api/src/controller/http/middleware.ts
index 5394e48e1..5a2afe5bc 100644
--- a/api/src/controller/http/middleware.ts
+++ b/api/src/controller/http/middleware.ts
@@ -3,6 +3,8 @@ import 'express-async-errors';
 import { HttpError as ValidationError } from 'express-openapi-validator/dist/framework/types';
 import { Logger } from 'winston';
 
+import { getErrorMessage } from '@src/util/error';
+
 import {
   BadRequestErrorType,
   CustomError,
@@ -56,7 +58,7 @@ export class Middleware {
     } else {
       customError = new CustomError(
         InternalErrorType.UNEXPECTED,
-        'Unexpected error happened'
+        `Unexpected error occured, error: ${getErrorMessage(err)}`
       );
     }
 
@@ -129,6 +131,21 @@ export class Middleware {
   ) => {
     const statusCode = this.getStatusCode(err);
 
+    switch (true) {
+      case statusCode >= 500:
+        this.logger.error('5xx error occured', {
+          error: err,
+          statusCode: statusCode
+        });
+        break;
+      case statusCode >= 400:
+        this.logger.warn('4xx error occured', {
+          error: err,
+          statusCode: statusCode
+        });
+        break;
+    }
+
     res.locals.error = err;
     res.status(statusCode);
     res.send({
diff --git a/api/test/controller/http/middleware.test.ts b/api/test/controller/http/middleware.test.ts
index a2791cf8d..71cb1a91d 100644
--- a/api/test/controller/http/middleware.test.ts
+++ b/api/test/controller/http/middleware.test.ts
@@ -176,7 +176,7 @@ describe('Test middleware', () => {
   let baseUrl: string;
 
   beforeAll(async () => {
-    mockLogger = {};
+    mockLogger = { error: jest.fn(), warn: jest.fn() };
     testHttpServer = new TestHttpServer(mockLogger as Logger);
     baseUrl = '/api/v1/dev';
     await testHttpServer.start();
@@ -215,7 +215,7 @@ describe('Test middleware', () => {
     expect(response.status).toEqual(500);
     expect(response.body).toStrictEqual({
       type: InternalErrorType.UNEXPECTED,
-      messages: ['Unexpected error happened']
+      messages: ['Unexpected error occured, error: Error from throwSyncError']
     });
   });
 
@@ -226,7 +226,7 @@ describe('Test middleware', () => {
     expect(response.status).toEqual(500);
     expect(response.body).toStrictEqual({
       type: InternalErrorType.UNEXPECTED,
-      messages: ['Unexpected error happened']
+      messages: ['Unexpected error occured, error: Error from throwAsyncError']
     });
   });