diff --git a/backend/app/validators/course.ts b/backend/app/validators/course.ts
index 807433c..d9dfcbb 100644
--- a/backend/app/validators/course.ts
+++ b/backend/app/validators/course.ts
@@ -6,6 +6,6 @@ export const createCourseValidator = vine.compile(
       .string()
       .unique(async (db, value) => !(await db.from('courses').where('id', value).first())),
     name: vine.string(),
-    registrationId: vine.number(),
+    registrationId: vine.string(),
   })
 )
diff --git a/backend/database/seeders/1_registration_seeder.ts b/backend/database/seeders/1_registration_seeder.ts
index 5299af8..0b15548 100644
--- a/backend/database/seeders/1_registration_seeder.ts
+++ b/backend/database/seeders/1_registration_seeder.ts
@@ -6,17 +6,17 @@ export default class extends BaseSeeder {
     await Registration.createMany([
       {
         name: 'W05-EBR-SI-3',
-        department: 'Wydział Elektryczny [W5]',
+        departmentId: 'Wydział Elektryczny [W5]',
         round: 1,
       },
       {
         name: 'W13-HWDP-SI-3',
-        department: 'Wydział Matematyki [W13]',
+        departmentId: 'Wydział Matematyki [W13]',
         round: 2,
       },
       {
         name: 'W4-IST-SI-3',
-        department: 'Wydział Informatyki i Telekomunikacji [W4N]',
+        departmentId: 'Wydział Informatyki i Telekomunikacji [W4N]',
         round: 1,
       },
     ])
diff --git a/backend/database/seeders/3_course_seeder.ts b/backend/database/seeders/3_course_seeder.ts
index 69f9130..48a04ee 100644
--- a/backend/database/seeders/3_course_seeder.ts
+++ b/backend/database/seeders/3_course_seeder.ts
@@ -4,8 +4,8 @@ import { BaseSeeder } from '@adonisjs/lucid/seeders'
 export default class extends BaseSeeder {
   async run() {
     await Course.createMany([
-      { id: 'usos.mathematics.com', name: 'Mathematics 101', registrationId: 1 },
-      { id: 'usos.physics.com', name: 'Physics 2', registrationId: 2 },
+      { id: 'usos.mathematics.com', name: 'Mathematics 101', registrationId: '1' },
+      { id: 'usos.physics.com', name: 'Physics 2', registrationId: '2' },
     ])
   }
 }
diff --git a/backend/start/scheduler.ts b/backend/start/scheduler.ts
index 44b9171..e863134 100644
--- a/backend/start/scheduler.ts
+++ b/backend/start/scheduler.ts
@@ -12,6 +12,7 @@ import Registration from '#models/registration'
 import Course from '#models/course'
 import Group from '#models/group'
 
+//@ts-ignore
 const scrapData = async () => {
   console.log('Scraping departments')
   const departments = await scrapDepartments()