diff --git a/src/modules/content/entities/post.entity.ts b/src/modules/content/entities/post.entity.ts
index 8a0e34d..601502c 100644
--- a/src/modules/content/entities/post.entity.ts
+++ b/src/modules/content/entities/post.entity.ts
@@ -40,6 +40,6 @@ export class PostEntity extends BaseEntity {
     @CreateDateColumn({ comment: '创建时间' })
     createdAt?: Date;
 
-    @UpdateDateColumn({ comment: '更新时间' })
+    @UpdateDateColumn({ comment: '更新时间', nullable: true })
     updatedAt?: Date;
 }