diff --git a/package.json b/package.json
index 779226c..cb74de9 100644
--- a/package.json
+++ b/package.json
@@ -6,7 +6,8 @@
   "types": "./@types/index.d.ts",
   "scripts": {
     "build": "tsc",
-    "watch": "npm run build -- --watch"
+    "watch": "npm run build -- --watch",
+    "postinstall": "npm run build"
   },
   "repository": "gitea@git.kuba-orlik.name:kuba/async-spawner.git",
   "author": "Kuba Orlik",