diff --git a/rpc/examples/echo/frontend/package.json b/rpc/examples/echo/frontend/package.json
index 6159272e..a801847b 100644
--- a/rpc/examples/echo/frontend/package.json
+++ b/rpc/examples/echo/frontend/package.json
@@ -17,6 +17,7 @@
     "typescript": "^4.8.4",
     "vite": "^4.0.0"
   },
+  "type": "module",
   "scripts": {
     "prepare": "./etc/prepare.sh",
     "build": "vite build",
diff --git a/rpc/examples/echo/server/templates/index.html b/rpc/examples/echo/server/templates/index.html
index 638a3eb6..a8dfd564 100644
--- a/rpc/examples/echo/server/templates/index.html
+++ b/rpc/examples/echo/server/templates/index.html
@@ -11,7 +11,6 @@
       window.externalAuthToEntity = {{ .ExternalAuthToEntity }}
       window.accessToken = {{ .AccessToken }}
     </script>
-    <script src="./static/main.mjs"></script>
   <style>
     table {
       border-collapse: collapse;
@@ -21,6 +20,7 @@
       padding: 0.5rem;
     }
   </style>
+    <script src="./static/main.js"></script>
   </head>
   <body>
     <table>
diff --git a/rpc/examples/fileupload/frontend/package.json b/rpc/examples/fileupload/frontend/package.json
index 5e8c1e51..c6e7d5c9 100644
--- a/rpc/examples/fileupload/frontend/package.json
+++ b/rpc/examples/fileupload/frontend/package.json
@@ -17,6 +17,7 @@
     "typescript": "^4.8.4",
     "vite": "^4.0.0"
   },
+  "type": "module",
   "scripts": {
     "prepare": "./etc/prepare.sh",
     "build": "vite build",
