diff --git a/README.md b/README.md
index d389f8b..a413fa3 100644
--- a/README.md
+++ b/README.md
@@ -249,7 +249,7 @@ module.exports = {
 ```ts
 import { transform } from 'unplugin-vue2-script-setup'
 
-const Vue2SFC = transform(`
+const Vue2SFC = await transform(`
 <template>
   <!-- ... -->
 </template>
diff --git a/jest.js b/jest.js
index bf42d7c..dcd4584 100644
--- a/jest.js
+++ b/jest.js
@@ -15,8 +15,8 @@ function requireVueJest() {
 }
 
 module.exports = {
-  process(source, filename, ...args) {
-    const transformed = transform(source, filename)
+  async process(source, filename, ...args) {
+    const transformed = await transform(source, filename)
     const code = transformed ? transformed.code : source
     return requireVueJest().process.call(this, code, filename, ...args)
   },
diff --git a/package.json b/package.json
index 5c3d7cf..16f28be 100644
--- a/package.json
+++ b/package.json
@@ -49,11 +49,6 @@
       "require": "./dist/webpack.js",
       "import": "./dist/webpack.mjs",
       "types": "./webpack.d.ts"
-    },
-    "./lib": {
-      "require": "./dist/lib.js",
-      "import": "./dist/lib.mjs",
-      "types": "./lib.d.ts"
     }
   },
   "main": "dist/index.js",
@@ -101,6 +96,7 @@
     "@types/babel__core": "^7.1.18",
     "@types/estree": "^0.0.51",
     "@types/node": "^17.0.21",
+    "@types/pug": "^2.0.6",
     "@types/ws": "^8.5.0",
     "@vue/composition-api": "^1.4.6",
     "@vue/runtime-dom": "^3.2.31",
@@ -117,9 +113,9 @@
     "vitest": "0.5.4"
   },
   "peerDependencies": {
-    "pug": "^3.0.2",
     "@vue/composition-api": "^1.4.3",
-    "@vue/runtime-dom": "^3.2.31"
+    "@vue/runtime-dom": "^3.2.31",
+    "pug": "^3.0.2"
   },
   "peerDependenciesMeta": {
     "pug": {
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 11c0106..4d49a4d 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -23,6 +23,7 @@ importers:
       '@types/babel__core': ^7.1.18
       '@types/estree': ^0.0.51
       '@types/node': ^17.0.21
+      '@types/pug': ^2.0.6
       '@types/ws': ^8.5.0
       '@vue/compiler-core': ^3.2.31
       '@vue/compiler-dom': ^3.2.31
@@ -69,6 +70,7 @@ importers:
       '@types/babel__core': 7.1.18
       '@types/estree': 0.0.51
       '@types/node': 17.0.21
+      '@types/pug': 2.0.6
       '@types/ws': 8.5.0
       '@vue/composition-api': 1.4.6
       '@vue/runtime-dom': 3.2.31
@@ -2486,6 +2488,10 @@ packages:
     resolution: {integrity: sha512-SuT16Q1K51EAVPz1K29DJ/sXjhSQ0zjvsypYJ6tlwVsRV9jwW5Adq2ch8Dq8kDBCkYnELS7N7VNCSB5nC56t/g==}
     dev: true
 
+  /@types/pug/2.0.6:
+    resolution: {integrity: sha512-SnHmG9wN1UVmagJOnyo/qkk0Z7gejYxOYYmaAwr5u2yFYfsupN3sg10kyzN8Hep/2zbHxCnsumxOoRIRMBwKCg==}
+    dev: true
+
   /@types/q/1.5.5:
     resolution: {integrity: sha512-L28j2FcJfSZOnL1WBjDYp2vUHCeIFlyYI/53EwD/rKUBQ7MtUUfbQWiyKJGpcnv4/WgrhWsFKrcPstcAt/J0tQ==}
     dev: true
@@ -7132,7 +7138,7 @@ packages:
     optional: true
 
   /fsevents/2.3.2:
-    resolution: {integrity: sha512-xiqMQR4xAeHTuB9uWm+fFRcIOgKBMiOBP+eXiyT7jsgVCq1bkVygt00oASowB7EdtpOHaaPgKt812P9ab+DDKA==}
+    resolution: {integrity: sha1-ilJveLj99GI7cJ4Ll1xSwkwC/Ro=}
     engines: {node: ^8.16.0 || ^10.6.0 || >=11.0.0}
     os: [darwin]
     requiresBuild: true
diff --git a/rollup.config.js b/rollup.config.js
index e5f9695..0e669b6 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -13,8 +13,7 @@ const entries = [
   'src/vite.ts',
   'src/rollup.ts',
   'src/esbuild.ts',
-  'src/nuxt.ts',
-  'src/lib.ts',
+  'src/nuxt.ts'
 ]
 
 const dtsEntries = [
diff --git a/src/core/parseSFC.ts b/src/core/parseSFC.ts
index eba58c3..97b4d8d 100644
--- a/src/core/parseSFC.ts
+++ b/src/core/parseSFC.ts
@@ -1,6 +1,5 @@
 /* eslint-disable one-var */
 /* eslint-disable @typescript-eslint/no-namespace */
-import { createRequire } from 'module'
 import { notNullish, partition } from '@antfu/utils'
 import type { Program } from '@babel/types'
 import type { ParserPlugin } from '@babel/parser'
@@ -83,14 +82,6 @@ const BUILD_IN_DIRECTIVES = new Set([
   // 'ref',
 ])
 
-function getRequire() {
-  return (
-    (typeof require === 'function')
-      ? require
-      : createRequire(import.meta.url)
-  )
-}
-
 function getComponents(node: TemplateChildNode): string[] {
   const current
     = node.type === NodeTypes.ELEMENT && node.tagType === ElementTypes.COMPONENT
@@ -282,11 +273,11 @@ function getBabelParserOptions(lang: string | null | undefined) {
     plugins,
   }
 }
-export function parseSFC(
+export async function parseSFC(
   code: string,
   id?: string,
   options?: ScriptSetupTransformOptions,
-): ParsedSFC {
+): Promise<ParsedSFC> {
   const elementChildren = baseParse(code, parserOptions).children.flatMap(x =>
     x.type === NodeTypes.ELEMENT && x.tagType === ElementTypes.ELEMENT
       ? [x]
@@ -376,7 +367,7 @@ export function parseSFC(
             && p.value.content === 'pug',
       )
         ? baseParse(
-          getRequire()('pug').compile(
+          (await import('pug')).compile(
             templateNode.children.map(x => x.loc.source).join(''),
             {
               filename: id,
diff --git a/src/core/transform.ts b/src/core/transform.ts
index b3de7e5..414c59d 100644
--- a/src/core/transform.ts
+++ b/src/core/transform.ts
@@ -15,12 +15,12 @@ export function shouldTransform(code: string, id: string, options?: ScriptSetupT
   return (options?.reactivityTransform && shouldTransformRefSugar(code)) || scriptSetupRE.test(code)
 }
 
-export function transform(input: string, id: string, options?: ScriptSetupTransformOptions): TransformResult {
+export async function transform(input: string, id: string, options?: ScriptSetupTransformOptions): Promise<TransformResult> {
   if (!shouldTransform(input, id, options))
     return null
   const resolved = resolveOptions(options)
   if (id.endsWith('.vue') || id.includes('.vue?vue'))
-    return transformVue(input, id, resolved)
+    return await transformVue(input, id, resolved)
   else
     return transformNonVue(input, id, resolved)
 }
@@ -36,10 +36,10 @@ function transformNonVue(input: string, id: string, options: ResolvedOptions): T
   return null
 }
 
-function transformVue(input: string, id: string, options: ResolvedOptions): TransformResult {
+async function transformVue(input: string, id: string, options: ResolvedOptions): Promise<TransformResult> {
   const s = new MagicString(input)
 
-  const sfc = parseSFC(input, id)
+  const sfc = await parseSFC(input, id)
 
   if (options.reactivityTransform)
     transformSfcRefSugar(sfc, options)
diff --git a/src/index.ts b/src/index.ts
index f4beb31..ad3edbf 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -17,9 +17,9 @@ export const unplugin = createUnplugin<PluginOptions>((options = {}) => {
     transformInclude(id) {
       return filter(id)
     },
-    transform(code, id) {
+    async transform(code, id) {
       try {
-        return transform(code, id, options)
+        return await transform(code, id, options)
       }
       catch (e: any) {
         this.error(e)
diff --git a/test/errors.test.ts b/test/errors.test.ts
index cd49462..21e6fbf 100644
--- a/test/errors.test.ts
+++ b/test/errors.test.ts
@@ -2,8 +2,8 @@ import { describe, expect, it, vi } from 'vitest'
 import { transform as t } from '../src'
 
 describe('errors', () => {
-  it('langs', () => {
-    expect(() =>
+  it('langs', async() => {
+    await expect(() =>
       t(`
 <script setup>
 const a = 1
@@ -12,54 +12,51 @@ const a = 1
 <script lang="ts">
 export default {}
 </script>
-`, 'Lang.vue'))
-      .toThrowError('<script setup> language must be the same as <script>')
+`, 'Lang.vue')).rejects.toThrowError('<script setup> language must be the same as <script>')
   })
 
-  it('defineProps', () => {
-    expect(() =>
+  it('defineProps', async() => {
+    await expect(() =>
       t(`
 <script setup>
 defineProps()
 const a = defineProps()
 </script>
 `, 'DefineProps.vue'))
-      .toThrowError('duplicate defineProps() call')
+      .rejects.toThrowError('duplicate defineProps() call')
   })
 
-  it('top-level await', () => {
-    expect(() =>
+  it('top-level await', async() => {
+    await expect(() =>
       t(`
 <script setup>
 defineProps()
 await something()
 </script>
 `, 'TopLevel.vue'))
-      .toThrowError('top-level await is not supported in Vue 2')
+      .rejects.toThrowError('top-level await is not supported in Vue 2')
 
-    expect(() =>
+    await expect(() =>
       t(`
 <script setup>
 defineProps()
 const {data} = await something()
 </script>
 `, 'TopLevel.vue'))
-      .toThrowError('top-level await is not supported in Vue 2')
+      .rejects.toThrowError('top-level await is not supported in Vue 2')
   })
 
-  it('ref sugar', () => {
+  it('ref sugar', async() => {
     const consoleWarnMock = vi.spyOn(console, 'warn')
 
-    expect(() =>
-      t(`
+    await t(`
 <script setup>
 defineProps()
 const a = async () => {
   await something()
 }
 </script>
-`, 'App.vue'))
-      .not.toThrow()
+    `, 'App.vue')
 
     consoleWarnMock.mockRestore()
   })
diff --git a/test/transform.test.ts b/test/transform.test.ts
index 2052f90..3b455a1 100644
--- a/test/transform.test.ts
+++ b/test/transform.test.ts
@@ -18,10 +18,10 @@ describe('transform', () => {
     for (const file of files) {
       it(file.replace(/\\/g, '/'), async() => {
         const fixture = await fs.readFile(resolve(root, file), 'utf-8')
-        const result = transform(fixture, file, { reactivityTransform: true })?.code || fixture
+        const result = (await transform(fixture, file, { reactivityTransform: true }))?.code || fixture
         expect(result).toMatchSnapshot()
 
-        const result2 = transform(result, file, { reactivityTransform: true })?.code || result
+        const result2 = (await transform(result, file, { reactivityTransform: true }))?.code || result
         expect(result).toEqual(result2)
       })
     }