diff --git a/.gitignore b/.gitignore
index aad1f5f..ed02cfe 100644
--- a/.gitignore
+++ b/.gitignore
@@ -17,3 +17,4 @@ coverage/
 .tshy*
 .eslintcache
 dist
+package-lock.json
diff --git a/README.md b/README.md
index 2573058..6309c57 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,7 @@ npm install sendmessage --save
 
 ```ts
 import { fork } from 'node:child_process';
-import sendmessage from 'sendmessage';
+import { sendmessage } from 'sendmessage';
 
 const worker = fork('./worker.js');
 
@@ -37,7 +37,7 @@ sendmessage(worker, { hi: 'this is a message to worker' });
 ### worker.js
 
 ```ts
-import sendmessage from 'sendmessage';
+import { sendmessage } from 'sendmessage';
 
 sendmessage(process, { hello: 'this is a message to master' });
 ```
diff --git a/package.json b/package.json
index a3d004c..5d6f559 100644
--- a/package.json
+++ b/package.json
@@ -12,18 +12,17 @@
     "ci": "c8 -r lcov -r text -r text-summary npm test",
     "prepublishOnly": "tshy && tshy-after"
   },
-  "dependencies": {},
   "devDependencies": {
-    "@arethetypeswrong/cli": "^0.15.3",
+    "@arethetypeswrong/cli": "^0.17.1",
     "@eggjs/tsconfig": "1",
     "@types/mocha": "10",
-    "@types/node": "20",
+    "@types/node": "22",
     "c8": "^10.1.2",
     "eslint": "8",
-    "eslint-config-egg": "13",
+    "eslint-config-egg": "14",
     "mm": "3",
-    "mocha": "^10.4.0",
-    "tshy": "1",
+    "mocha": "^11.0.1",
+    "tshy": "^3.0.2",
     "tshy-after": "1",
     "typescript": "5"
   },
@@ -54,12 +53,10 @@
   "exports": {
     ".": {
       "import": {
-        "source": "./src/index.ts",
         "types": "./dist/esm/index.d.ts",
         "default": "./dist/esm/index.js"
       },
       "require": {
-        "source": "./src/index.ts",
         "types": "./dist/commonjs/index.d.ts",
         "default": "./dist/commonjs/index.js"
       }
@@ -71,5 +68,6 @@
     "src"
   ],
   "types": "./dist/commonjs/index.d.ts",
-  "main": "./dist/commonjs/index.js"
+  "main": "./dist/commonjs/index.js",
+  "module": "./dist/esm/index.js"
 }
diff --git a/src/index.ts b/src/index.ts
index c8ae5aa..f58101d 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -68,3 +68,5 @@ export default function sendmessage(child: ChildProcessOrWorker, message: unknow
   console.warn('[%s][sendmessage] WARN pid#%s channel closed, nothing send\nstack: %s',
     Date(), pid, err.stack);
 }
+
+export { sendmessage };
diff --git a/test/sendmessage.test.js b/test/sendmessage.test.js
index 194f5ca..8dd24f5 100644
--- a/test/sendmessage.test.js
+++ b/test/sendmessage.test.js
@@ -5,7 +5,7 @@ import childprocess from 'node:child_process';
 import cluster from 'node:cluster';
 import workerThreads from 'node:worker_threads';
 import mm from 'mm';
-import sendmessage from '../dist/esm/index.js';
+import sendmessage, { sendmessage as sendmessage2 } from '../dist/esm/index.js';
 
 const __filename = fileURLToPath(import.meta.url);
 const __dirname = path.dirname(__filename);
@@ -35,7 +35,7 @@ describe('sendmessage.test.js', () => {
           hi: 'this is a message send to master',
         });
 
-        sendmessage(child, {
+        sendmessage2(child, {
           from: 'master',
           reply: 'this is a reply message send to child',
         });