diff --git a/src/modules/knowledge-base/knowledge-base.repository.ts b/src/modules/knowledge-base/knowledge-base.repository.ts
index f30f4b8..76fdd04 100644
--- a/src/modules/knowledge-base/knowledge-base.repository.ts
+++ b/src/modules/knowledge-base/knowledge-base.repository.ts
@@ -5,12 +5,13 @@ import { PrismaService } from '../../infrastructure/database/prisma.service';
 export class KnowledgeBaseRepository {
   constructor(private readonly prisma: PrismaService) {}
 
-  async create(userId: string, dto: { title: string; description?: string }) {
+  async create(userId: string, dto: { title: string; description?: string; coverKey?: string }) {
     return this.prisma.knowledgeBase.create({
       data: {
         userId,
         title: dto.title,
         description: dto.description ?? '',
+        coverKey: dto.coverKey ?? null,
         status: 'active',
         itemCount: 0,
       },