diff --git a/apps/backend/src/issues/dto/create-issue-comment.dto.ts b/apps/backend/src/issues/dto/create-issue-comment.dto.ts
index a124656..6c40da3 100644
--- a/apps/backend/src/issues/dto/create-issue-comment.dto.ts
+++ b/apps/backend/src/issues/dto/create-issue-comment.dto.ts
@@ -1,6 +1,11 @@
 import { IsString, MaxLength, MinLength } from 'class-validator';
 
 export class CreateIssueCommentDto {
+  @IsString()
+  @MinLength(3)
+  @MaxLength(16)
+  username: string;
+
   @IsString()
   @MinLength(1)
   @MaxLength(255)
diff --git a/apps/backend/src/issues/dto/create-issue.dto.ts b/apps/backend/src/issues/dto/create-issue.dto.ts
index 45401c3..09fff86 100644
--- a/apps/backend/src/issues/dto/create-issue.dto.ts
+++ b/apps/backend/src/issues/dto/create-issue.dto.ts
@@ -1,4 +1,5 @@
 import {
+  IsAlphanumeric,
   IsEnum,
   IsNumber,
   IsString,
@@ -13,6 +14,12 @@ export class CreateIssueDto {
   @MaxLength(32)
   title: string;
 
+  @IsString()
+  @IsAlphanumeric()
+  @MinLength(3)
+  @MaxLength(16)
+  username: string;
+
   @IsString()
   @MinLength(10)
   @MaxLength(255)
diff --git a/apps/backend/src/issues/dto/update-issue.dto.ts b/apps/backend/src/issues/dto/update-issue.dto.ts
index e4e242d..d179d27 100644
--- a/apps/backend/src/issues/dto/update-issue.dto.ts
+++ b/apps/backend/src/issues/dto/update-issue.dto.ts
@@ -2,5 +2,5 @@ import { OmitType, PartialType } from '@nestjs/mapped-types';
 import { CreateIssueDto } from './create-issue.dto';
 
 export class UpdateIssueDto extends PartialType(
-  OmitType(CreateIssueDto, ['type']),
+  OmitType(CreateIssueDto, ['type', 'username']),
 ) {}
diff --git a/apps/backend/src/issues/entities/issue-comment.entity.ts b/apps/backend/src/issues/entities/issue-comment.entity.ts
index 62c3fac..1463006 100644
--- a/apps/backend/src/issues/entities/issue-comment.entity.ts
+++ b/apps/backend/src/issues/entities/issue-comment.entity.ts
@@ -12,6 +12,9 @@ export class IssueComment {
   @PrimaryGeneratedColumn('uuid')
   id: string;
 
+  @Column()
+  username: string;
+
   @ManyToOne(() => Issue, { onDelete: 'CASCADE', lazy: true })
   issue: Promise<Issue>;
 
@@ -24,6 +27,7 @@ export class IssueComment {
   toDto() {
     return {
       content: this.content,
+      username: this.username,
       createdAt: this.createdAt.toISOString(),
     };
   }
diff --git a/apps/backend/src/issues/entities/issue.entity.ts b/apps/backend/src/issues/entities/issue.entity.ts
index 556b94e..c830287 100644
--- a/apps/backend/src/issues/entities/issue.entity.ts
+++ b/apps/backend/src/issues/entities/issue.entity.ts
@@ -15,6 +15,9 @@ export class Issue {
   @Column()
   title: string;
 
+  @Column()
+  username: string;
+
   @Column()
   description: string;
 
@@ -36,6 +39,7 @@ export class Issue {
   toDto() {
     return {
       id: this.id,
+      username: this.username,
       title: this.title,
       type: this.type,
       status: this.status,