diff --git a/backend/internal/data/migrations/migrations/20230305071524_add_group_id_to_notifiers.sql b/backend/internal/data/migrations/migrations/20230305071524_add_group_id_to_notifiers.sql
new file mode 100644
index 0000000..5f0f16d
--- /dev/null
+++ b/backend/internal/data/migrations/migrations/20230305071524_add_group_id_to_notifiers.sql
@@ -0,0 +1,20 @@
+-- disable the enforcement of foreign-keys constraints
+PRAGMA foreign_keys = off;
+-- create "new_notifiers" table
+CREATE TABLE `new_notifiers` (`id` uuid NOT NULL, `created_at` datetime NOT NULL, `updated_at` datetime NOT NULL, `name` text NOT NULL, `url` text NOT NULL, `is_active` bool NOT NULL DEFAULT true, `group_id` uuid NOT NULL, `user_id` uuid NOT NULL, PRIMARY KEY (`id`), CONSTRAINT `notifiers_groups_notifiers` FOREIGN KEY (`group_id`) REFERENCES `groups` (`id`) ON DELETE CASCADE, CONSTRAINT `notifiers_users_notifiers` FOREIGN KEY (`user_id`) REFERENCES `users` (`id`) ON DELETE CASCADE);
+-- copy rows from old table "notifiers" to new temporary table "new_notifiers"
+INSERT INTO `new_notifiers` (`id`, `created_at`, `updated_at`, `name`, `url`, `is_active`, `user_id`) SELECT `id`, `created_at`, `updated_at`, `name`, `url`, `is_active`, `user_id` FROM `notifiers`;
+-- drop "notifiers" table after copying rows
+DROP TABLE `notifiers`;
+-- rename temporary table "new_notifiers" to "notifiers"
+ALTER TABLE `new_notifiers` RENAME TO `notifiers`;
+-- create index "notifier_user_id" to table: "notifiers"
+CREATE INDEX `notifier_user_id` ON `notifiers` (`user_id`);
+-- create index "notifier_user_id_is_active" to table: "notifiers"
+CREATE INDEX `notifier_user_id_is_active` ON `notifiers` (`user_id`, `is_active`);
+-- create index "notifier_group_id" to table: "notifiers"
+CREATE INDEX `notifier_group_id` ON `notifiers` (`group_id`);
+-- create index "notifier_group_id_is_active" to table: "notifiers"
+CREATE INDEX `notifier_group_id_is_active` ON `notifiers` (`group_id`, `is_active`);
+-- enable back the enforcement of foreign-keys constraints
+PRAGMA foreign_keys = on;
diff --git a/backend/internal/data/migrations/migrations/atlas.sum b/backend/internal/data/migrations/migrations/atlas.sum
index d928893..84c48d2 100644
--- a/backend/internal/data/migrations/migrations/atlas.sum
+++ b/backend/internal/data/migrations/migrations/atlas.sum
@@ -1,4 +1,4 @@
-h1:ZyM3lKzq56l2l2mr1wjKS6sl7vS1i1gCMEw3aWz6Bjk=
+h1:VjVLPBHzJ8N1Hiw+Aeitb0alnVn9UFilnajCzc+pie8=
 20220929052825_init.sql h1:ZlCqm1wzjDmofeAcSX3jE4h4VcdTNGpRg2eabztDy9Q=
 20221001210956_group_invitations.sql h1:YQKJFtE39wFOcRNbZQ/d+ZlHwrcfcsZlcv/pLEYdpjw=
 20221009173029_add_user_roles.sql h1:vWmzAfgEWQeGk0Vn70zfVPCcfEZth3E0JcvyKTjpYyU=
@@ -11,3 +11,4 @@ h1:ZyM3lKzq56l2l2mr1wjKS6sl7vS1i1gCMEw3aWz6Bjk=
 20221205234812_cascade_delete_roles.sql h1:VIiaImR48nCHF3uFbOYOX1E79Ta5HsUBetGaSAbh9Gk=
 20230227024134_add_scheduled_date.sql h1:8qO5OBZ0AzsfYEQOAQQrYIjyhSwM+v1A+/ylLSoiyoc=
 20230305065819_add_notifier_types.sql h1:r5xrgCKYQ2o9byBqYeAX1zdp94BLdaxf4vq9OmGHNl0=
+20230305071524_add_group_id_to_notifiers.sql h1:xDShqbyClcFhvJbwclOHdczgXbdffkxXNWjV61hL/t4=