diff --git a/server/core/initializers/constants.ts b/server/core/initializers/constants.ts
index 29f556c7c..a3a0b4951 100644
--- a/server/core/initializers/constants.ts
+++ b/server/core/initializers/constants.ts
@@ -45,7 +45,7 @@ import { cpus } from 'os'
 
 // ---------------------------------------------------------------------------
 
-const LAST_MIGRATION_VERSION = 835
+const LAST_MIGRATION_VERSION = 840
 
 // ---------------------------------------------------------------------------
 
diff --git a/server/core/initializers/migrations/0840-user-export-size.ts b/server/core/initializers/migrations/0840-user-export-size.ts
new file mode 100644
index 000000000..c8e1e9f97
--- /dev/null
+++ b/server/core/initializers/migrations/0840-user-export-size.ts
@@ -0,0 +1,24 @@
+import * as Sequelize from 'sequelize'
+
+async function up (utils: {
+  transaction: Sequelize.Transaction
+  queryInterface: Sequelize.QueryInterface
+  sequelize: Sequelize.Sequelize
+}): Promise<void> {
+  const { transaction } = utils
+
+  {
+    await utils.queryInterface.changeColumn('userExport', 'size', {
+      type: Sequelize.BIGINT,
+      allowNull: true
+    }, { transaction })
+  }
+}
+
+function down (options) {
+  throw new Error('Not implemented.')
+}
+
+export {
+  down, up
+}
diff --git a/server/core/models/user/user-export.ts b/server/core/models/user/user-export.ts
index 9c78fdc5a..3b6377ebe 100644
--- a/server/core/models/user/user-export.ts
+++ b/server/core/models/user/user-export.ts
@@ -55,7 +55,7 @@ export class UserExportModel extends SequelizeModel<UserExportModel> {
   error: string
 
   @AllowNull(true)
-  @Column
+  @Column(DataType.BIGINT)
   size: number
 
   @AllowNull(false)