diff --git a/libs/config/src/lib/applications.config.spec.ts b/libs/config/src/lib/applications.config.spec.ts
index 5628a4b..d7f9532 100644
--- a/libs/config/src/lib/applications.config.spec.ts
+++ b/libs/config/src/lib/applications.config.spec.ts
@@ -2,16 +2,16 @@ import { gatewayConfig, userAppConfig } from './applications.config';
 
 describe('Config Tests', () => {
   describe('gatewayConfig', () => {
-    it('should return default values when environment variables are not set', () => {
+    it('should return default gateway config when no environment variables are set', () => {
       const config = gatewayConfig();
       expect(config).toEqual({
         protocol: 'http',
         host: 'localhost',
-        port: '3333',
+        port: 3333,
       });
     });
 
-    it('should return environment variable values when they are set', () => {
+    it('should return gateway config with environment variables', () => {
       process.env['PROTOCOL'] = 'https';
       process.env['GATEWAY_HOST'] = 'gateway.example.com';
       process.env['GATEWAY_PORT'] = '4444';
@@ -20,7 +20,7 @@ describe('Config Tests', () => {
       expect(config).toEqual({
         protocol: 'https',
         host: 'gateway.example.com',
-        port: '4444',
+        port: 4444,
       });
 
       delete process.env['PROTOCOL'];
@@ -30,17 +30,17 @@ describe('Config Tests', () => {
   });
 
   describe('userAppConfig', () => {
-    it('should return default values when environment variables are not set', () => {
+    it('should return default user app config when no environment variables are set', () => {
       const config = userAppConfig();
       expect(config).toEqual({
         protocol: 'http',
         host: 'localhost',
-        port: '15001',
+        port: 15001,
         name: 'user',
       });
     });
 
-    it('should return environment variable values when they are set', () => {
+    it('should return user app config with environment variables', () => {
       process.env['PROTOCOL'] = 'https';
       process.env['USER_HOST'] = 'user.example.com';
       process.env['USER_PORT'] = '5555';
@@ -49,7 +49,7 @@ describe('Config Tests', () => {
       expect(config).toEqual({
         protocol: 'https',
         host: 'user.example.com',
-        port: '5555',
+        port: 5555,
         name: 'user',
       });
 
diff --git a/libs/config/src/lib/applications.config.ts b/libs/config/src/lib/applications.config.ts
index 7aafa77..8c0c2ea 100644
--- a/libs/config/src/lib/applications.config.ts
+++ b/libs/config/src/lib/applications.config.ts
@@ -1,22 +1,39 @@
 import { registerAs } from '@nestjs/config';
 
-const DEFAULT_PROTOCOL = 'http';
-const DEFAULT_HOST = 'localhost';
+interface ServiceConfig {
+  protocol: string;
+  host: string;
+  port: number;
+  name?: string;
+}
+
+const DEFAULT_PROTOCOL = 'http' as const;
+const DEFAULT_HOST = 'localhost' as const;
 const DEFAULT_PORT = {
-  user: '15001',
-  task: '15002',
-  gateway: '3333',
-};
+  user: 15001,
+  task: 15002,
+  gateway: 3333,
+} as const;
 
-export const gatewayConfig = registerAs('gateway', () => ({
-  protocol: process.env['PROTOCOL'] ?? DEFAULT_PROTOCOL,
-  host: process.env['GATEWAY_HOST'] ?? DEFAULT_HOST,
-  port: process.env['GATEWAY_PORT'] ?? DEFAULT_PORT.gateway,
-}));
+export const gatewayConfig = registerAs(
+  'gateway',
+  (): ServiceConfig => ({
+    protocol: process.env['PROTOCOL'] ?? DEFAULT_PROTOCOL,
+    host: process.env['GATEWAY_HOST'] ?? DEFAULT_HOST,
+    port: process.env['GATEWAY_PORT']
+      ? Number(process.env['GATEWAY_PORT'])
+      : DEFAULT_PORT.gateway,
+  }),
+);
 
-export const userAppConfig = registerAs('userApp', () => ({
-  protocol: process.env['PROTOCOL'] ?? DEFAULT_PROTOCOL,
-  host: process.env['USER_HOST'] ?? DEFAULT_HOST,
-  port: process.env['USER_PORT'] ?? DEFAULT_PORT.user,
-  name: 'user',
-}));
+export const userAppConfig = registerAs(
+  'userApp',
+  (): ServiceConfig => ({
+    protocol: process.env['PROTOCOL'] ?? DEFAULT_PROTOCOL,
+    host: process.env['USER_HOST'] ?? DEFAULT_HOST,
+    port: process.env['USER_PORT']
+      ? Number(process.env['USER_PORT'])
+      : DEFAULT_PORT.user,
+    name: 'user',
+  }),
+);