diff --git a/packages/vant-touch-emulator/build.js b/packages/vant-touch-emulator/build.js
new file mode 100644
index 000000000..f28813b81
--- /dev/null
+++ b/packages/vant-touch-emulator/build.js
@@ -0,0 +1,11 @@
+const fs = require('fs');
+const path = require('path');
+
+const srcFile = path.join(__dirname, 'src', 'index.js');
+const distDir = path.join(__dirname, 'dist');
+
+if (!fs.existsSync(distDir)) {
+  fs.mkdirSync(distDir);
+}
+fs.copyFileSync(srcFile, path.join(distDir, 'index.js'));
+fs.copyFileSync(srcFile, path.join(distDir, 'index.mjs'));
diff --git a/packages/vant-touch-emulator/changelog.md b/packages/vant-touch-emulator/changelog.md
index 69d213800..d112a9e04 100644
--- a/packages/vant-touch-emulator/changelog.md
+++ b/packages/vant-touch-emulator/changelog.md
@@ -1,5 +1,11 @@
 # Changelog
 
+### [v1.4.0]
+
+`2022-08-06`
+
+- support `.mjs` extension
+
 ### [v1.3.1]
 
 `2021-07-06`
diff --git a/packages/vant-touch-emulator/package.json b/packages/vant-touch-emulator/package.json
index e4cc08e51..0c1b6a406 100644
--- a/packages/vant-touch-emulator/package.json
+++ b/packages/vant-touch-emulator/package.json
@@ -1,10 +1,16 @@
 {
   "name": "@vant/touch-emulator",
-  "version": "1.3.2",
+  "version": "1.4.0",
   "description": "Vant touch emulator",
-  "main": "index.js",
+  "main": "dist/index.js",
+  "module": "dist/index.mjs",
+  "scripts": {
+    "build": "node ./build.js",
+    "prepare": "pnpm build"
+  },
   "publishConfig": {
-    "access": "public"
+    "access": "public",
+    "registry": "https://registry.npmjs.org/"
   },
   "repository": {
     "type": "git",
diff --git a/packages/vant-touch-emulator/index.js b/packages/vant-touch-emulator/src/index.js
similarity index 100%
rename from packages/vant-touch-emulator/index.js
rename to packages/vant-touch-emulator/src/index.js