diff --git a/server/migrations/20201206210619-update-attachment-cols.js b/server/migrations/20201206210619-update-attachment-cols.js
new file mode 100644
index 00000000..1cacacdf
--- /dev/null
+++ b/server/migrations/20201206210619-update-attachment-cols.js
@@ -0,0 +1,29 @@
+'use strict';
+
+module.exports = {
+  up: async (queryInterface, Sequelize) => {
+    await queryInterface.changeColumn(
+      "attachments",
+      "key",
+      { type: Sequelize.STRING(4096), allowNull: false, }
+    );
+    await queryInterface.changeColumn(
+      "attachments",
+      "url",
+      { type: Sequelize.STRING(4096), allowNull: false, }
+    );
+  },
+
+  down: async (queryInterface, Sequelize) => {
+    await queryInterface.changeColumn(
+      "attachments",
+      "key",
+      { type: Sequelize.STRING(255), allowNull: false, }
+    );
+    await queryInterface.changeColumn(
+      "attachments",
+      "url",
+      { type: Sequelize.STRING(255), allowNull: false, }
+    );
+  }
+};