diff --git a/main.js b/main.js
index 59b3e680..6a557333 100644
--- a/main.js
+++ b/main.js
@@ -1,9 +1,9 @@
-const nodemailer = require("nodemailer");
-const core = require("@actions/core");
-const glob = require("@actions/glob");
-const fs = require("fs");
-const showdown = require("showdown");
-const path = require("path");
+import nodemailer from "nodemailer";
+import * as core from "@actions/core";
+import * as glob from "@actions/glob";
+import fs from "node:fs";
+import showdown from "showdown";
+import path from "node:path";
 
 function getText(textOrFile, convertMarkdown) {
     let text = textOrFile;
diff --git a/package.json b/package.json
index c6d85ac5..3010e6a6 100644
--- a/package.json
+++ b/package.json
@@ -1,5 +1,6 @@
 {
   "name": "action-send-mail",
+  "type": "module",
   "main": "main.js",
   "dependencies": {
     "@actions/core": "^3.0.0",