diff --git a/src/main/resources/db/migration/V231__alter_callvan_notification.sql b/src/main/resources/db/migration/V231__alter_callvan_notification.sql
new file mode 100644
index 000000000..1c4932cc0
--- /dev/null
+++ b/src/main/resources/db/migration/V231__alter_callvan_notification.sql
@@ -0,0 +1,3 @@
+ALTER TABLE `koin`.`callvan_notification`
+    MODIFY COLUMN `current_participants` INT NULL,
+    MODIFY COLUMN `max_participants` INT NULL;