diff --git a/libs/common/src/helper/randomString.ts b/libs/common/src/helper/randomString.ts
new file mode 100644
index 0000000..5a664e3
--- /dev/null
+++ b/libs/common/src/helper/randomString.ts
@@ -0,0 +1,10 @@
+export function generateRandomString(length: number): string {
+  const characters =
+    'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
+  let randomString = '';
+  for (let i = 0; i < length; i++) {
+    const randomIndex = Math.floor(Math.random() * characters.length);
+    randomString += characters.charAt(randomIndex);
+  }
+  return randomString;
+}
diff --git a/package-lock.json b/package-lock.json
index a629215..47268ca 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -28,7 +28,6 @@
         "helmet": "^7.1.0",
         "ioredis": "^5.3.2",
         "morgan": "^1.10.0",
-        "nanoid": "^5.0.7",
         "nodemailer": "^6.9.10",
         "passport-jwt": "^4.0.1",
         "pg": "^8.11.3",
@@ -5255,20 +5254,6 @@
       "integrity": "sha512-OO0pH2lK6a0hZnAdau5ItzHPI6pUlvI7jMVnxUQRtw4owF2wk8lOSabtGDCTP4Ggrg2MbGnWO9X8K1t4+fGMDw==",
       "dev": true
     },
-    "node_modules/fsevents": {
-      "version": "2.3.3",
-      "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-2.3.3.tgz",
-      "integrity": "sha512-5xoDfX+fL7faATnagmWPpbFtwh/R77WmMMqqHGS65C3vvB0YHrgF+B1YmZ3441tMj5n63k0212XNoJwzlhffQw==",
-      "dev": true,
-      "hasInstallScript": true,
-      "optional": true,
-      "os": [
-        "darwin"
-      ],
-      "engines": {
-        "node": "^8.16.0 || ^10.6.0 || >=11.0.0"
-      }
-    },
     "node_modules/function-bind": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/function-bind/-/function-bind-1.1.2.tgz",
diff --git a/package.json b/package.json
index a5d2431..a8502be 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,6 @@
     "helmet": "^7.1.0",
     "ioredis": "^5.3.2",
     "morgan": "^1.10.0",
-    "nanoid": "^5.0.7",
     "nodemailer": "^6.9.10",
     "passport-jwt": "^4.0.1",
     "pg": "^8.11.3",
diff --git a/src/unit/services/unit.service.ts b/src/unit/services/unit.service.ts
index 8051469..449aaa1 100644
--- a/src/unit/services/unit.service.ts
+++ b/src/unit/services/unit.service.ts
@@ -18,6 +18,7 @@ import {
 import { SpaceEntity } from '@app/common/modules/space/entities';
 import { UpdateUnitNameDto } from '../dtos/update.unit.dto';
 import { UserSpaceRepository } from '@app/common/modules/user-space/repositories';
+import { generateRandomString } from '@app/common/helper/randomString';
 
 @Injectable()
 export class UnitService {
@@ -284,10 +285,8 @@ export class UnitService {
   }
   async getUnitInvitationCode(unitUuid: string): Promise<any> {
     try {
-      const { nanoid } = await import('nanoid');
-
       // Generate a 6-character random invitation code
-      const invitationCode = nanoid(6);
+      const invitationCode = generateRandomString(6);
 
       // Update the unit with the new invitation code
       await this.spaceRepository.update({ uuid: unitUuid }, { invitationCode });
@@ -304,6 +303,8 @@ export class UnitService {
         type: updatedUnit.spaceType.type,
       };
     } catch (err) {
+      console.log('err', err);
+
       if (err instanceof BadRequestException) {
         throw err;
       } else {