diff --git a/sql/00016.sql b/sql/00016.sql
new file mode 100644
index 0000000..9f9aad5
--- /dev/null
+++ b/sql/00016.sql
@@ -0,0 +1,9 @@
+ALTER TYPE notification_type RENAME TO _notification_type;
+CREATE TYPE notification_type AS ENUM ('NTFY', 'SCRIPT');
+
+ALTER TABLE notification RENAME COLUMN service TO _service;
+ALTER TABLE notification ADD service notification_type NOT NULL DEFAULT 'NTFY';
+UPDATE notification SET service = _service::text::notification_type;
+
+ALTER TABLE notification DROP COLUMN _service;
+DROP TYPE _notification_type;