diff --git a/main.js b/main.js
new file mode 100644
index 0000000..b461c7a
--- /dev/null
+++ b/main.js
@@ -0,0 +1,13 @@
+/*
+ * Copyright 2021 Netsyms Technologies.
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+nw.Window.open('index.html', {
+    id: "com.netsyms.ipentool_mainwindow"
+}, function (win) {
+    win.setMinimumSize(300, 450);
+    win.setPosition("center");
+});
diff --git a/package.json b/package.json
index f27631a..631dcc8 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "IPENtool",
-    "main": "index.html",
+    "main": "main.js",
     "version": "1.0.0",
     "keywords": [
         "util",