diff --git a/package.json b/package.json
index 069bd41..84b8695 100644
--- a/package.json
+++ b/package.json
@@ -4,22 +4,23 @@
   "description": "Source text manipulation and span rendering utilities",
   "author": "Yura Dupyn <yura@dupyn.com>",
   "license": "GPL-3.0-or-later",
-  "main": "./dist/index.js",
+  "main": "./dist/index.cjs", 
   "module": "./dist/index.mjs",
   "types": "./dist/index.d.ts",
   "exports": {
     ".": {
       "types": "./dist/index.d.ts",
       "import": "./dist/index.mjs",
-      "require": "./dist/index.js"
+      "require": "./dist/index.cjs"
     }
   },
   "scripts": {
-    "build": "tsup src/index.ts --format cjs,esm --dts",
+    "build": "unbuild",
+    "stub": "unbuild --stub",
     "typecheck": "tsc --noEmit"
   },
   "devDependencies": {
-    "tsup": "^8.5.1",
-    "typescript": "^5.4.0"
+    "typescript": "^5.4.0",
+    "unbuild": "^3.6.1"
   }
 }