diff --git a/apps/server/src/task/domain/update-information.type.ts b/apps/server/src/task/domain/update-information.type.ts
index bbb643c..f2d395c 100644
--- a/apps/server/src/task/domain/update-information.type.ts
+++ b/apps/server/src/task/domain/update-information.type.ts
@@ -1,7 +1,15 @@
-export type UpdateInformation = {
+import { IsNumber, IsOptional, IsString } from 'class-validator';
+
+export class UpdateInformation {
+  @IsOptional()
+  @IsNumber()
   position: number;
 
+  @IsOptional()
+  @IsString()
   content: string;
 
+  @IsOptional()
+  @IsNumber()
   length: number;
-};
+}
diff --git a/apps/server/src/task/dto/task-event-response.dto.ts b/apps/server/src/task/dto/task-event-response.dto.ts
index 8f65b7d..f20cbfe 100644
--- a/apps/server/src/task/dto/task-event-response.dto.ts
+++ b/apps/server/src/task/dto/task-event-response.dto.ts
@@ -6,8 +6,17 @@ export class TaskEventResponse {
 
   event: EventType;
 
-  constructor(taskEvent: TaskEvent) {
-    this.taskId = taskEvent.taskId;
-    this.event = taskEvent.event;
+  static from(taskEvent: TaskEvent) {
+    const response = new TaskEventResponse();
+    response.taskId = taskEvent.taskId;
+    response.event = taskEvent.event;
+    return response;
+  }
+
+  static of(taskId: number, taskEvent: TaskEvent) {
+    const response = new TaskEventResponse();
+    response.taskId = taskId;
+    response.event = taskEvent.event;
+    return response;
   }
 }
diff --git a/apps/server/src/task/dto/task-event.dto.ts b/apps/server/src/task/dto/task-event.dto.ts
index bc0829c..72b7a78 100644
--- a/apps/server/src/task/dto/task-event.dto.ts
+++ b/apps/server/src/task/dto/task-event.dto.ts
@@ -1,14 +1,25 @@
-import { IsNumber, IsNotEmpty, IsString, IsEnum } from 'class-validator';
+import {
+  IsNumber,
+  IsNotEmpty,
+  IsString,
+  IsEnum,
+  ValidateNested,
+  IsOptional,
+} from 'class-validator';
+import { Type } from 'class-transformer';
 import { EventType } from '@/task/domain/eventType.enum';
 import { UpdateInformation } from '@/task/domain/update-information.type';
 
 export class TaskEvent {
+  @IsOptional()
   @IsNumber()
   taskId: number;
 
+  @IsOptional()
   @IsNumber()
   sectionId: number;
 
+  @IsOptional()
   @IsString()
   position: string;
 
@@ -16,5 +27,8 @@ export class TaskEvent {
   @IsEnum(EventType)
   event: EventType;
 
+  @IsOptional()
+  @ValidateNested()
+  @Type(() => UpdateInformation)
   title: UpdateInformation;
 }
diff --git a/apps/server/src/task/service/task.service.ts b/apps/server/src/task/service/task.service.ts
index 34672e3..c591db9 100644
--- a/apps/server/src/task/service/task.service.ts
+++ b/apps/server/src/task/service/task.service.ts
@@ -23,7 +23,7 @@ import { ContributorStatus } from '@/project/enum/contributor-status.enum';
 import { TaskEventResponse } from '@/task/dto/task-event-response.dto';
 import { UpdateInformation } from '@/task/domain/update-information.type';
 
-const { json0 } = ShareDB.types;
+const json0 = ShareDB.types.defaultType;
 
 @Injectable()
 export class TaskService {
@@ -73,13 +73,13 @@ export class TaskService {
       const existing = await this.findTaskOrThrow(taskEvent.taskId);
       const result = this.merge(taskEvent, existing);
 
-      const transformedOp = lastOp.length ? json0.type.transform(result, lastOp, 'right') : result;
+      const transformedOp = lastOp.length ? json0.transform(result, lastOp, 'right') : result;
 
       this.taskRepository.save(result);
 
-      this.eventEmitter.emit('broadcast', userId, projectId, new TaskEventResponse(taskEvent));
+      this.eventEmitter.emit('broadcast', userId, projectId, TaskEventResponse.from(taskEvent));
 
-      lastOp = json0.type.compose(lastOp, transformedOp);
+      lastOp = json0.compose(lastOp, transformedOp);
     }
   }
 
@@ -87,9 +87,10 @@ export class TaskService {
     const updateTitle = change.title;
     const existingTitle = existing.title;
     const { event } = change;
+    console.log(change);
     const op = this.convertToShareDbOp(event, updateTitle);
 
-    const newTitle = json0.type.apply(existingTitle, op);
+    const newTitle = json0.apply(existingTitle, op);
 
     return { ...existing, title: newTitle };
   }
@@ -101,12 +102,7 @@ export class TaskService {
       case EventType.INSERT_TITLE:
         return [{ p: [position], si: content }];
       case EventType.DELETE_TITLE:
-        return [
-          {
-            p: [position],
-            sd: content,
-          },
-        ];
+        return [{ p: [position], sd: content }];
       default:
         throw new BadRequestException('Invalid event type');
     }
@@ -129,7 +125,12 @@ export class TaskService {
       section,
     });
 
-    this.eventEmitter.emit('broadcast', userId, projectId, new TaskEventResponse(taskEvent));
+    this.eventEmitter.emit(
+      'broadcast',
+      userId,
+      projectId,
+      TaskEventResponse.of(task.id, taskEvent)
+    );
     return new CreateTaskResponse(task);
   }
 
@@ -180,7 +181,7 @@ export class TaskService {
     task.section = section;
     await this.taskRepository.save(task);
 
-    this.eventEmitter.emit('broadcast', userId, projectId, new TaskEventResponse(taskEvent));
+    this.eventEmitter.emit('broadcast', userId, projectId, TaskEventResponse.from(taskEvent));
     return new MoveTaskResponse(task);
   }
 
@@ -210,7 +211,7 @@ export class TaskService {
     }
     await this.taskRepository.delete(taskEvent.taskId);
 
-    this.eventEmitter.emit('broadcast', userId, projectId, new TaskEventResponse(taskEvent));
+    this.eventEmitter.emit('broadcast', userId, projectId, TaskEventResponse.from(taskEvent));
     return new DeleteTaskResponse(taskEvent.taskId);
   }