diff --git a/package.json b/package.json
index 2f6f2c9..af296e1 100644
--- a/package.json
+++ b/package.json
@@ -3,6 +3,7 @@
   "version": "0.0.0",
   "scripts": {
     "ng": "ng",
+    "postinstall": "ngcc --properties es2015 browser module main --first-only --create-ivy-entry-points",
     "start": "ng serve --host 0.0.0.0 --open --port 4300",
     "build": "ng build ngx-flowchart --prod",
     "test": "ng test ngx-flowchart",