diff --git a/package.json b/package.json
index a575330..ffbf486 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,7 @@
   "description": "svgcanvas",
   "main": "dist/svgcanvas.js",
   "scripts": {
-    "build": "rollup index.js -o dist/svgcanvas.js -f cjs && rollup test/index.js -o dist/test.js -f iife",
+    "build": "rollup index.js -o dist/svgcanvas.js -f cjs && rollup index.js -o dist/svgcanvas.esm.js -f es && rollup test/index.js -o dist/test.js -f iife",
     "prepublishOnly": "npm run build"
   },
   "keywords": [