diff --git a/libs/skeleton/src/interfaces/controller/skeleton-crud.controller.interface.ts b/libs/skeleton/src/interfaces/controller/skeleton-crud.controller.interface.ts
index bf33f46..9d3a6b4 100644
--- a/libs/skeleton/src/interfaces/controller/skeleton-crud.controller.interface.ts
+++ b/libs/skeleton/src/interfaces/controller/skeleton-crud.controller.interface.ts
@@ -1,8 +1,8 @@
 import { IPaginationEntity } from '@autocrud/skeleton/entities/pagination.entity';
 
-export interface ISkeletonCRUDController<T> {
+export interface ISkeletonCRUDController<T, E> {
   create(): Promise<T>;
-  readSelected(id): Promise<T>;
+  readSelected(id: E): Promise<T>;
   readPagination(): Promise<IPaginationEntity<T>>;
   readEntire(): Promise<T[]>;
   updatePartial(): Promise<T>;
diff --git a/libs/skeleton/src/skeleton-crud.controller.ts b/libs/skeleton/src/skeleton-crud.controller.ts
index 444b1c0..3e9be38 100644
--- a/libs/skeleton/src/skeleton-crud.controller.ts
+++ b/libs/skeleton/src/skeleton-crud.controller.ts
@@ -2,14 +2,16 @@ import { Delete, Get, Param, Patch, Post, Put } from '@nestjs/common';
 import { ISkeletonCRUDController } from './interfaces/controller/skeleton-crud.controller.interface';
 import { IPaginationEntity } from './entities/pagination.entity';
 
-export class SkeletonCRUDController<T> implements ISkeletonCRUDController<T> {
+export class SkeletonCRUDController<T, E>
+  implements ISkeletonCRUDController<T, E>
+{
   @Post()
   async create(): Promise<T> {
     throw new Error('Method not implemented.');
   }
 
   @Get(':id')
-  async readSelected(@Param('id') id): Promise<T> {
+  async readSelected(@Param('id') id: E): Promise<T> {
     throw new Error('Method not implemented.');
   }