diff --git a/.tool-versions b/.tool-versions
new file mode 100644
index 0000000..e13b25d
--- /dev/null
+++ b/.tool-versions
@@ -0,0 +1 @@
+nodejs 12.4.0
diff --git a/package.json b/package.json
index 9e3278f..93614ee 100644
--- a/package.json
+++ b/package.json
@@ -1,13 +1,17 @@
 {
-  "name": "unnamed",
+  "name": "bazaar",
   "version": "1.0.0",
   "main": "index.js",
   "repository": "git@github.com:pastleo/unnamed.git",
   "author": "Lego Chiang <qas612820704@gmail.com>",
   "license": "MIT",
+  "type": "module",
   "dependencies": {
     "debug": "^4.1.1",
     "uuid": "^3.3.2",
     "ws": "^7.0.0"
+  },
+  "scripts": {
+    "dev": "DEBUG=\"bazaar:*\" node --experimental-modules server/index.js"
   }
 }
diff --git a/server/debug.js b/server/debug.js
index c3dca77..077dff4 100644
--- a/server/debug.js
+++ b/server/debug.js
@@ -1,3 +1,6 @@
-const debug = require('debug');
+import dbg from 'debug';
 
-exports.websocket = debug('bazaar:websocket');
+const debug = {
+  websocket: dbg('bazaar:websocket'),
+}
+export default debug;
diff --git a/server/index.js b/server/index.js
index b983b36..9e826f0 100644
--- a/server/index.js
+++ b/server/index.js
@@ -1,6 +1,10 @@
-const uuid = require('uuid/v4');
-const wss = require('./wss');
-const debug = require('./debug');
+import uuid from 'uuid';
+import wss from './wss.js';
+import debug from './debug.js';
+
+// testing shared utils:
+import { randomStr } from '../web_client/lib/utils.js';
+console.log('testing shared utils: randomStr() =', randomStr());
 
 /**
  * @type {Map<WebSocket, string>} wsToIdMap
diff --git a/server/wss.js b/server/wss.js
index aa77841..226bef8 100644
--- a/server/wss.js
+++ b/server/wss.js
@@ -1,4 +1,4 @@
-const WebSocket = require('ws');
+import WebSocket from 'ws';
 
 const port = process.env.PORT || 9527;
 
@@ -26,4 +26,4 @@ const wss = new WebSocket.Server({
   }
 });
 
-module.exports = wss;
+export default wss;