diff --git a/apps/server/src/entity/course.entity.ts b/apps/server/src/entity/course.entity.ts
index 10b251f..8fc1fd2 100644
--- a/apps/server/src/entity/course.entity.ts
+++ b/apps/server/src/entity/course.entity.ts
@@ -5,13 +5,13 @@ export class Course {
   @PrimaryColumn()
   course_id?: string;
 
-  @Column({ unique: true })
+  @Column()
   course_title?: string;
 
   @Column({ type: 'text' })
   course_summary?: string;
 
-  @Column({ length: 1000 })
+  @Column()
   course_cover_url?: string;
 
   @Column({ default: 1 })