diff --git a/models/article.ts b/models/article.ts
index 676b92d..18ba0c7 100644
--- a/models/article.ts
+++ b/models/article.ts
@@ -41,7 +41,7 @@ export default class Article extends Model {
   @TypeORM.Column({ nullable: true, type: "integer" })
   comments_num: number;
 
-  @TypeORM.Column({ nullable: true, type: "boolean" })
+  @TypeORM.Column({ default: true, type: "boolean" })
   allow_comment: boolean;
 
   @TypeORM.Index()