diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3bda580..fb6058c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/).
 
 ### [1.0.2] - 2025-01-30
 
+- replace .replace(//g) with a replaceAll
 - prettier: move config into package.json
 - dep(eslint): upgrade to v9
 - dep(all): bump versions
diff --git a/index.js b/index.js
index 18bb1c7..138e7c8 100644
--- a/index.js
+++ b/index.js
@@ -320,7 +320,7 @@ exports.big_company = function (next, connection, helo) {
 
   const allowed_rdns = this.cfg.bigco[helo].split(/,/)
   for (const allow of allowed_rdns) {
-    const re = new RegExp(`${allow.replace(/\./g, '\\.')}$`)
+    const re = new RegExp(`${allow.replaceAll('.', '\\.')}$`)
     if (re.test(rdns)) {
       connection.results.add(this, { pass: 'big_co' })
       return next()
diff --git a/test/index.js b/test/index.js
index 006f14c..65a49da 100644
--- a/test/index.js
+++ b/test/index.js
@@ -334,8 +334,8 @@ describe('helo.checks', () => {
     beforeEach(_set_up)
 
     it('pass, reject=false', (t, done) => {
-      const test_helo = 'yahoo.com'
-      this.connection.remote.host = 'yahoo.com'
+      const test_helo = 'yahoo.co.jp'
+      this.connection.remote.host = 'yahoo.co.jp'
       this.plugin.cfg.check.big_company = true
       this.plugin.cfg.reject.big_company = true
       this.plugin.big_company(