diff --git a/CHANGELOG.md b/CHANGELOG.md
index a6e68e7..c677806 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+## [3.4.1] - 2023-08-05
+
+### BUGFIX
+
+- Fixed TypeScript type export error.
+
 ## [3.4.0] - 2023-04-15
 
 ### Performance
diff --git a/README-zh_cn.md b/README-zh_cn.md
index 90999ec..9658f18 100644
--- a/README-zh_cn.md
+++ b/README-zh_cn.md
@@ -67,6 +67,22 @@ createApp({
 </script>
 ```
 
+在 Vue 3 中配合 `TypeScript` 使用：
+
+```html
+<template>
+  <qrcode-vue :value="value" :level="level" :render-as="renderAs" />
+</template>
+
+<script setup lang="ts">
+  import { ref } from 'vue'
+  import QrcodeVue, { Level, RenderAs } from 'qrcode.vue'
+  
+  const value = ref<String>('qrcode')
+  const level = ref<Level>('M')
+  const renderAs = ref<RenderAs>('svg')
+</script>
+
 ## Component props
 
 ### `value`
diff --git a/README.md b/README.md
index 6449e4b..f445c3c 100644
--- a/README.md
+++ b/README.md
@@ -69,6 +69,22 @@ Or single-file components with a `*.vue` extension:
 </script>
 ```
 
+When you use the component with Vue 3 with `TypeScript`:
+
+```html
+<template>
+  <qrcode-vue :value="value" :level="level" :render-as="renderAs" />
+</template>
+<script setup lang="ts">
+  import { ref } from 'vue'
+  import QrcodeVue, { Level, RenderAs } from 'qrcode.vue'
+
+  const value = ref('qrcode')
+  const level = ref<Level>('M')
+  const renderAs = ref<RenderAs>('svg')
+</script>
+```
+
 ## Component props
 
 ### `value`
diff --git a/package.json b/package.json
index 3afc6ed..2b286d7 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "qrcode.vue",
-  "version": "3.4.0",
+  "version": "3.4.1",
   "description": "A Vue.js component to generate QRCode.",
   "type": "module",
   "main": "./dist/qrcode.vue.cjs.js",
diff --git a/src/index.ts b/src/index.ts
index 9da900f..5b2b755 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -2,7 +2,8 @@ import { defineComponent, h, onMounted, onUpdated, PropType, ref } from 'vue'
 import QR from './qrcodegen'
 
 type Modules = ReturnType<QR.QrCode['getModules']>
-type Level = 'L' | 'M' | 'Q' | 'H'
+export type Level = 'L' | 'M' | 'Q' | 'H'
+export type RenderAs = 'canvas' | 'svg'
 
 const defaultErrorCorrectLevel = 'H'
 
@@ -104,7 +105,7 @@ const QRCodeProps = {
 const QRCodeVueProps = {
   ...QRCodeProps,
   renderAs: {
-    type: String as PropType<'canvas' | 'svg'>,
+    type: String as PropType<RenderAs>,
     required: false,
     default: 'canvas',
     validator: (as: any) => ['canvas', 'svg'].indexOf(as) > -1,