diff --git a/backend/src/user/dto/create-user.dto.ts b/backend/src/user/dto/create-user.dto.ts
index 0311be13..8a5e72e0 100644
--- a/backend/src/user/dto/create-user.dto.ts
+++ b/backend/src/user/dto/create-user.dto.ts
@@ -1 +1,12 @@
-export class CreateUserDto {}
+import { ApiProperty } from '@nestjs/swagger';
+
+export class CreateUserDto {
+  @ApiProperty()
+  email: string;
+
+  @ApiProperty({ required: false })
+  name?: string;
+
+  @ApiProperty()
+  password: string;
+}
diff --git a/backend/src/user/user.controller.ts b/backend/src/user/user.controller.ts
index 25ff847e..edd6b0a1 100644
--- a/backend/src/user/user.controller.ts
+++ b/backend/src/user/user.controller.ts
@@ -8,6 +8,7 @@ import {
   Delete,
 } from '@nestjs/common';
 import { UserService } from './user.service';
+import { CreateUserDto } from './dto/create-user.dto';
 import { UpdateUserDto } from './dto/update-user.dto';
 import { User as UserModel } from '@prisma/client';
 
@@ -17,9 +18,9 @@ export class UserController {
 
   @Post()
   create(
-    @Body() userData: { name?: string; email: string; password: string },
+    @Body() createUserDto: CreateUserDto,
   ): Promise<UserModel> {
-    return this.userService.create(userData);
+    return this.userService.create(createUserDto);
   }
 
   @Get()
@@ -35,9 +36,9 @@ export class UserController {
   @Patch(':id')
   update(
     @Param('id') id: string,
-    @Body() userData: { name?: string; email?: string; password?: string },
+    @Body() updateUserDto: UpdateUserDto,
   ) {
-    return this.userService.update(+id, userData);
+    return this.userService.update(+id, updateUserDto);
   }
 
   @Delete(':id')
diff --git a/backend/src/user/user.service.ts b/backend/src/user/user.service.ts
index f0fc280e..ac73d3be 100644
--- a/backend/src/user/user.service.ts
+++ b/backend/src/user/user.service.ts
@@ -1,4 +1,5 @@
 import { Injectable } from '@nestjs/common';
+import { CreateUserDto } from './dto/create-user.dto';
 import { UpdateUserDto } from './dto/update-user.dto';
 import { PrismaService } from 'src/prisma/prisma.service';
 import { User, Prisma } from '@prisma/client';
@@ -8,11 +9,11 @@ import bcrypt from 'bcrypt';
 export class UserService {
   constructor(private prisma: PrismaService) {}
 
-  async create(data: Prisma.UserCreateInput): Promise<User> {
+  async create(createUserDto: CreateUserDto): Promise<User> {
     const saltRounds = 10;
-    const hashedPassword = await bcrypt.hash(data.password, saltRounds);
-    data.password = hashedPassword;
-    return this.prisma.user.create({ data });
+    const hashedPassword = await bcrypt.hash(createUserDto.password, saltRounds);
+    createUserDto.password = hashedPassword;
+    return this.prisma.user.create({ data: createUserDto });
   }
 
   findAll() {
@@ -20,13 +21,13 @@ export class UserService {
   }
 
   findOne(id: number) {
-    return this.prisma.user.findFirst({ where: { id: id } });
+    return this.prisma.user.findUnique({ where: { id: id } });
   }
 
-  update(id: number, data: Prisma.UserUpdateInput) {
+  update(id: number, updateUserDto: UpdateUserDto) {
     return this.prisma.user.update({
-      data,
       where: { id: id },
+      data: updateUserDto,
     });
   }