diff --git a/backend/src/project/dto/epic/EpicCreateRequest.dto.ts b/backend/src/project/dto/epic/EpicCreateRequest.dto.ts
index 775039a..4acff8f 100644
--- a/backend/src/project/dto/epic/EpicCreateRequest.dto.ts
+++ b/backend/src/project/dto/epic/EpicCreateRequest.dto.ts
@@ -1,9 +1,17 @@
 import { Type } from 'class-transformer';
-import { IsEnum, IsNotEmpty, IsString, Matches, ValidateNested } from 'class-validator';
+import {
+  IsEnum,
+  IsNotEmpty,
+  IsString,
+  Length,
+  Matches,
+  ValidateNested,
+} from 'class-validator';
 import { EpicColor } from 'src/project/entity/epic.entity';
 
 class Epic {
   @IsString()
+  @Length(1, 10)
   name: string;
 
   @IsEnum(EpicColor)
diff --git a/backend/src/project/dto/epic/EpicUpdateRequest.dto.ts b/backend/src/project/dto/epic/EpicUpdateRequest.dto.ts
index abce63f..29cf6e2 100644
--- a/backend/src/project/dto/epic/EpicUpdateRequest.dto.ts
+++ b/backend/src/project/dto/epic/EpicUpdateRequest.dto.ts
@@ -7,6 +7,7 @@ import {
   IsString,
   Matches,
   ValidateNested,
+  Length,
 } from 'class-validator';
 import { EpicColor } from 'src/project/entity/epic.entity';
 
@@ -17,6 +18,7 @@ class Epic {
 
   @IsOptional()
   @IsString()
+  @Length(1, 10)
   name?: string;
 
   @IsOptional()
diff --git a/backend/src/project/dto/story/StoryCreateRequest.dto.ts b/backend/src/project/dto/story/StoryCreateRequest.dto.ts
index 13cdb9f..71bf166 100644
--- a/backend/src/project/dto/story/StoryCreateRequest.dto.ts
+++ b/backend/src/project/dto/story/StoryCreateRequest.dto.ts
@@ -4,16 +4,22 @@ import {
   IsInt,
   IsNotEmpty,
   IsString,
+  Length,
   Matches,
+  Max,
+  Min,
   ValidateNested,
 } from 'class-validator';
 import { StoryStatus } from 'src/project/entity/story.entity';
 
 class Story {
   @IsString()
+  @Length(1, 100)
   title: string;
 
   @IsInt()
+  @Min(0)
+  @Max(100)
   point: number;
 
   @IsEnum(StoryStatus)
diff --git a/backend/src/project/dto/story/StoryUpdateRequest.dto.ts b/backend/src/project/dto/story/StoryUpdateRequest.dto.ts
index 4e4d22a..cea3c75 100644
--- a/backend/src/project/dto/story/StoryUpdateRequest.dto.ts
+++ b/backend/src/project/dto/story/StoryUpdateRequest.dto.ts
@@ -5,7 +5,10 @@ import {
   IsNotEmpty,
   IsOptional,
   IsString,
+  Length,
   Matches,
+  Max,
+  Min,
   ValidateNested,
 } from 'class-validator';
 import { StoryStatus } from 'src/project/entity/story.entity';
@@ -20,10 +23,13 @@ class Story {
 
   @IsOptional()
   @IsString()
+  @Length(1, 100)
   title?: string;
-
+  
   @IsOptional()
   @IsInt()
+  @Min(0)
+  @Max(100)
   point?: number;
 
   @IsOptional()
diff --git a/backend/src/project/dto/task/TaskCreateRequest.dto.ts b/backend/src/project/dto/task/TaskCreateRequest.dto.ts
index 40b1625..e2486c5 100644
--- a/backend/src/project/dto/task/TaskCreateRequest.dto.ts
+++ b/backend/src/project/dto/task/TaskCreateRequest.dto.ts
@@ -41,7 +41,7 @@ export function IsOneDecimalPlace(validationOptions?: ValidationOptions) {
 
 class Task {
   @IsString()
-  @Length(0, 100, { message: 'Title must be 100 characters or less' })
+  @Length(1, 100, { message: 'Title must be 100 characters or less' })
   title: string;
 
   @IsOptional()
diff --git a/backend/src/project/dto/task/TaskUpdateRequest.dto.ts b/backend/src/project/dto/task/TaskUpdateRequest.dto.ts
index ce444aa..72b867d 100644
--- a/backend/src/project/dto/task/TaskUpdateRequest.dto.ts
+++ b/backend/src/project/dto/task/TaskUpdateRequest.dto.ts
@@ -5,6 +5,7 @@ import {
   IsNotEmpty,
   IsOptional,
   IsString,
+  Length,
   Matches,
   ValidateNested,
 } from 'class-validator';
@@ -21,6 +22,7 @@ class Task {
 
   @IsOptional()
   @IsString()
+  @Length(1, 100)
   title?: string;
 
   @IsOptional()
diff --git a/backend/src/project/entity/epic.entity.ts b/backend/src/project/entity/epic.entity.ts
index 3fbe3ce..5823ccd 100644
--- a/backend/src/project/entity/epic.entity.ts
+++ b/backend/src/project/entity/epic.entity.ts
@@ -33,7 +33,7 @@ export class Epic {
   @JoinColumn({ name: 'project_id' })
   project: Project;
 
-  @Column({ type: 'varchar', length: 255, nullable: false })
+  @Column({ type: 'varchar', length: 10, nullable: false })
   name: string;
 
   @Column({ type: 'varchar', length: 255, nullable: false })
diff --git a/backend/src/project/entity/story.entity.ts b/backend/src/project/entity/story.entity.ts
index e0a2506..6747180 100644
--- a/backend/src/project/entity/story.entity.ts
+++ b/backend/src/project/entity/story.entity.ts
@@ -35,7 +35,7 @@ export class Story {
   @JoinColumn({ name: 'epic_id' })
   epic: Epic;
 
-  @Column({ type: 'varchar', length: 255, nullable: false })
+  @Column({ type: 'varchar', length: 100, nullable: false })
   title: string;
 
   @Column({ type: 'int', nullable: false })
diff --git a/backend/src/project/entity/task.entity.ts b/backend/src/project/entity/task.entity.ts
index 63901e7..e13aed8 100644
--- a/backend/src/project/entity/task.entity.ts
+++ b/backend/src/project/entity/task.entity.ts
@@ -34,7 +34,7 @@ export class Task {
   @JoinColumn({ name: 'story_id' })
   story: Story;
 
-  @Column({ type: 'varchar', length: 99, nullable: false })
+  @Column({ type: 'varchar', length: 100, nullable: false })
   title: string;
 
   @Column({ type: 'int', nullable: false })