diff --git a/projects/lit-ts/package.json b/projects/lit-ts/package.json
index 715a324..490397e 100644
--- a/projects/lit-ts/package.json
+++ b/projects/lit-ts/package.json
@@ -1,6 +1,7 @@
 {
   "name": "maxgraph-ts-example-integrating-in-lit",
   "private": true,
+  "type": "module",
   "scripts": {
     "dev": "vite",
     "build": "tsc && vite build --base ./",
diff --git a/projects/parcel-ts/package.json b/projects/parcel-ts/package.json
index 3c99b1c..8c22230 100644
--- a/projects/parcel-ts/package.json
+++ b/projects/parcel-ts/package.json
@@ -1,6 +1,7 @@
 {
   "name": "maxgraph-ts-example-built-with-parcel",
   "private": true,
+  "type": "module",
   "scripts": {
     "dev": "parcel index.html",
     "build": "tsc && parcel build --public-url ./ index.html"
diff --git a/projects/rollup-ts/package.json b/projects/rollup-ts/package.json
index 3c843d5..de56652 100644
--- a/projects/rollup-ts/package.json
+++ b/projects/rollup-ts/package.json
@@ -1,6 +1,7 @@
 {
   "name": "maxgraph-ts-example-built-with-rollup",
   "private": true,
+  "type": "module",
   "scripts": {
     "build": "npm-run-all --sequential build:*",
     "build:bundle": "tsc && rollup -c",
diff --git a/projects/rollup-ts/rollup.config.mjs b/projects/rollup-ts/rollup.config.js
similarity index 100%
rename from projects/rollup-ts/rollup.config.mjs
rename to projects/rollup-ts/rollup.config.js
diff --git a/projects/vitejs-ts/package.json b/projects/vitejs-ts/package.json
index 252b68d..673b0f7 100644
--- a/projects/vitejs-ts/package.json
+++ b/projects/vitejs-ts/package.json
@@ -1,6 +1,7 @@
 {
   "name": "maxgraph-ts-example-built-with-vite",
   "private": true,
+  "type": "module",
   "scripts": {
     "dev": "vite",
     "build": "tsc && vite build --base ./",