diff --git a/packages/mindplot/.eslintrc.json b/packages/mindplot/.eslintrc.json
index 2aa693db..05357107 100644
--- a/packages/mindplot/.eslintrc.json
+++ b/packages/mindplot/.eslintrc.json
@@ -8,6 +8,9 @@
         "airbnb-base",
         "plugin:cypress/recommended"
     ],
+    "parserOptions": {
+        "ecmaVersion": 11
+    },
     "globals": {
         // designer is a global currently used as a hack. Remove this when fixing the hack.
         "designer": true
diff --git a/packages/mindplot/src/components/DesignerBuilder.js b/packages/mindplot/src/components/DesignerBuilder.js
index 57fb02ef..a2df7bd4 100644
--- a/packages/mindplot/src/components/DesignerBuilder.js
+++ b/packages/mindplot/src/components/DesignerBuilder.js
@@ -56,7 +56,7 @@ export function buildDesigner(options) {
 
   // Configure default persistence manager ...
   const persistence = options.persistenceManager;
-  $assert(persistence, "persistence must be defined");
+  $assert(persistence, 'persistence must be defined');
   PersistenceManager.init(persistence);
 
   // Register toolbar event ...
@@ -73,7 +73,7 @@ export function buildDesigner(options) {
 }
 
 export function buildDefaultOptions(persistence, readOnly = false) {
-  $assert(persistence, "persistence must be defined");
+  $assert(persistence, 'persistence must be defined');
   // Set workspace screen size as default. In this way, resize issues are solved.
   const containerSize = {
     height: Number.parseInt(window.screen.height, 10),
@@ -85,7 +85,7 @@ export function buildDefaultOptions(persistence, readOnly = false) {
     width: Number.parseInt(window.innerWidth, 10),
   };
   return {
-    readOnly: readOnly,
+    readOnly,
     zoom: 0.85,
     saveOnLoad: true,
     size: containerSize,
@@ -109,7 +109,7 @@ export async function loadOptions(jsonConf, persistence, readOnly = false) {
 
 export function loadExample(exampleFn) {
   $(() => {
-    // Hack: load bootstrap first
+    // eslint-disable-next-line import/no-extraneous-dependencies
     import('@libraries/bootstrap').then(exampleFn);
   });
 }
diff --git a/packages/mindplot/src/indexLoader.js b/packages/mindplot/src/indexLoader.js
index 3b9d72aa..2afe60c5 100644
--- a/packages/mindplot/src/indexLoader.js
+++ b/packages/mindplot/src/indexLoader.js
@@ -1,5 +1,5 @@
 import { $notify } from '@wisemapping/core-js';
-import { buildDesigner, loadDesignerOptions } from './components/DesignerBuilder';
+import { buildDesigner, buildDefaultOptions } from './components/DesignerBuilder';
 import RESTPersistenceManager from './components/RestPersistenceManager';
 import PersistenceManager from './components/PersistenceManager';
 
@@ -13,7 +13,7 @@ global.lockSession = 111111;
 global.lockTimestamp = 11111;
 
 // Configure designer options ...
-const options = loadDesignerOptions();
+const options = buildDefaultOptions();
 
 if (!global.memoryPersistence && !global.readOnlyMode) {
   options.persistenceManager = new RESTPersistenceManager(