diff --git a/src/auth/dtos/user-auth.dto.ts b/src/auth/dtos/user-auth.dto.ts
index 729b735..1d6e2a5 100644
--- a/src/auth/dtos/user-auth.dto.ts
+++ b/src/auth/dtos/user-auth.dto.ts
@@ -1,5 +1,6 @@
 import { ApiProperty } from '@nestjs/swagger';
 import { IsEmail, IsNotEmpty, IsString } from 'class-validator';
+import { IsPasswordStrong } from 'src/validators/password.validator';
 
 export class UserSignUpDto {
   @ApiProperty({
@@ -16,6 +17,10 @@ export class UserSignUpDto {
   })
   @IsString()
   @IsNotEmpty()
+  @IsPasswordStrong({
+    message:
+      'password must be at least 8 characters long and include at least one uppercase letter, one lowercase letter, one numeric digit, and one special character.',
+  })
   public password: string;
 
   @ApiProperty({