diff --git a/web-portal/backend/src/apps/apps.service.ts b/web-portal/backend/src/apps/apps.service.ts
index e17a2ab..34a0361 100644
--- a/web-portal/backend/src/apps/apps.service.ts
+++ b/web-portal/backend/src/apps/apps.service.ts
@@ -4,8 +4,7 @@ import { AppRule, PrismaClient, Tenant, RuleType } from '@/.generated/client';
 import { UserService } from '../user/user.service';
 import { createHash, randomBytes } from 'crypto';
 import { Request } from 'express';
-import { nanoid } from 'nanoid';
-import { NANO_ID_LENGTH } from '../utils/const';
+import { nanoid } from '@/src/utils/const';
 
 @Injectable()
 export class AppsService {
@@ -85,7 +84,7 @@ export class AppsService {
     if (!tenants) return;
     const newApp = await this.prisma.client.app.create({
       data: {
-        id: nanoid(NANO_ID_LENGTH),
+        id: nanoid(),
         tenantId: tenants[0].id,
         name,
         description,
diff --git a/web-portal/backend/src/tenant/tenant.service.ts b/web-portal/backend/src/tenant/tenant.service.ts
index f8e4c21..8c9269e 100644
--- a/web-portal/backend/src/tenant/tenant.service.ts
+++ b/web-portal/backend/src/tenant/tenant.service.ts
@@ -2,8 +2,7 @@ import { Injectable, Inject, HttpException, HttpStatus } from '@nestjs/common';
 import { CustomPrismaService } from 'nestjs-prisma';
 import { PrismaClient } from '@/.generated/client';
 import { createHash, randomBytes } from 'crypto';
-import { nanoid } from 'nanoid'
-import { NANO_ID_LENGTH } from '../utils/const';
+import { nanoid } from '@/src/utils/const';
 
 @Injectable()
 export class TenantService {
@@ -28,7 +27,7 @@ export class TenantService {
 
     const tenant = await this.prisma.client.tenant.create({
       data: {
-        id: nanoid(NANO_ID_LENGTH),
+        id: nanoid(),
         enterpriseId: enterprise.id,
         secretKey: hashedKey,
       },
diff --git a/web-portal/backend/src/user/user.service.ts b/web-portal/backend/src/user/user.service.ts
index 7cb60f9..d01eafc 100644
--- a/web-portal/backend/src/user/user.service.ts
+++ b/web-portal/backend/src/user/user.service.ts
@@ -6,8 +6,7 @@ import { TenantService } from '../tenant/tenant.service';
 import { unsealData } from 'iron-session';
 import { Request } from 'express';
 import { ISession, SESSION_OPTIONS } from '../siwe/siwe.service';
-import { nanoid } from 'nanoid';
-import { NANO_ID_LENGTH } from '../utils/const';
+import { nanoid } from '@/src/utils/const';
 
 @Injectable()
 export class UserService {
@@ -66,7 +65,7 @@ export class UserService {
             }
             const newUser = await this.prisma.client.user.create({
                 data: {
-                    id: nanoid(NANO_ID_LENGTH),
+                    id: nanoid(),
                     ethAddress: createHash('sha256').update(ethAddress).digest('hex'),
                     orgs: {
                         create: {
diff --git a/web-portal/backend/src/utils/const.ts b/web-portal/backend/src/utils/const.ts
index 7525bae..a4322dc 100644
--- a/web-portal/backend/src/utils/const.ts
+++ b/web-portal/backend/src/utils/const.ts
@@ -1,2 +1,5 @@
+import { customAlphabet } from "nanoid";
 export const NANO_ID_LENGTH = 10; // https://zelark.github.io/nano-id-cc/
 export const PORTR_ADDRESS = '0x54d5f8a0e0f06991e63e46420bcee1af7d9fe944';
+export const NANO_ID_ALPHABETS = '123456789ABCDEFGHIJKLMNPQRSTUVWXYZabcdefghijklmnpqrstuvwxyz';
+export const nanoid = () => customAlphabet(NANO_ID_ALPHABETS, NANO_ID_LENGTH);