diff --git a/package-lock.json b/package-lock.json
index 181c951..b180b2e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
 	"name": "css-time-sort",
-	"version": "2.0.2",
+	"version": "3.0.0-alpha.1",
 	"lockfileVersion": 3,
 	"requires": true,
 	"packages": {
 		"": {
 			"name": "css-time-sort",
-			"version": "2.0.2",
+			"version": "3.0.0-alpha.1",
 			"license": "MIT",
 			"devDependencies": {
 				"@codecov/vite-plugin": "^1.9.0",
@@ -15,6 +15,9 @@
 				"uvu": "^0.5.6",
 				"vite": "^6.2.6",
 				"vite-plugin-dts": "^4.5.3"
+			},
+			"engines": {
+				"node": ">=18.0.0"
 			}
 		},
 		"node_modules/@actions/core": {
diff --git a/package.json b/package.json
index 62a1250..e987748 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
 	"name": "css-time-sort",
 	"description": "Sort an array of CSS <time> values",
-	"version": "2.0.2",
+	"version": "3.0.0-alpha.1",
 	"type": "module",
 	"homepage": "https://github.com/projectwallace/css-time-sort",
 	"repository": {
@@ -30,16 +30,15 @@
 		"check": "tsc --noEmit",
 		"build": "vite build"
 	},
+	"engines": {
+		"node": ">=18.0.0"
+	},
+	"main": "./dist/css-time-sort.js",
+	"types": "./dist/index.d.ts",
 	"exports": {
 		"types": "./dist/index.d.ts",
-		"require": "./dist/css-time-sort.umd.cjs",
 		"default": "./dist/css-time-sort.js"
 	},
-	"source": "index.js",
-	"types": "./dist/index.d.ts",
-	"main": "./dist/css-time-sort.umd.cjs",
-	"module": "./dist/css-time-sort.js",
-	"unpkg": "./dist/css-time-sort.umd.cjs",
 	"devDependencies": {
 		"@codecov/vite-plugin": "^1.9.0",
 		"c8": "^10.1.3",
diff --git a/vite.config.js b/vite.config.js
index db44d4c..b135297 100644
--- a/vite.config.js
+++ b/vite.config.js
@@ -7,8 +7,7 @@ export default defineConfig({
 	build: {
 		lib: {
 			entry: resolve(__dirname, "index.js"),
-			name: "cssTimeSort",
-			fileName: "css-time-sort",
+			formats: ['es']
 		},
 		rollupOptions: {
 			// make sure to externalize deps that shouldn't be bundled