diff --git a/database/migrations/1584139902145_modify_submission_dates_nullable_schema.js b/database/migrations/1584139902145_modify_submission_dates_nullable_schema.js
new file mode 100644
index 0000000..086c5dc
--- /dev/null
+++ b/database/migrations/1584139902145_modify_submission_dates_nullable_schema.js
@@ -0,0 +1,26 @@
+'use strict'
+
+/** @type {import('@adonisjs/lucid/src/Schema')} */
+const Schema = use('Schema')
+
+class ModifySubmissionDatesNullableSchema extends Schema {
+ up () {
+ this.alter('submissions', (table) => {
+ // alter table
+ table.date('upload_date').nullable().alter()
+ table.date('creation_date').nullable().alter()
+ table.date('published_date').nullable().alter()
+ })
+ }
+
+ down () {
+ this.alter('submissions', (table) => {
+ // reverse alternations
+ table.date('upload_date').notNullable().alter()
+ table.date('creation_date').notNullable().alter()
+ table.date('published_date').notNullable().alter()
+ })
+ }
+}
+
+module.exports = ModifySubmissionDatesNullableSchema
