diff --git a/.eslintrc.js b/.eslintrc.js
deleted file mode 100644
index 27b2813..0000000
--- a/.eslintrc.js
+++ /dev/null
@@ -1,3 +0,0 @@
-module.exports = {
-  extends: "google"
-};
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 647984a..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,14 +0,0 @@
-language: node_js
-node_js:
-  - 12
-  - 14
-  - 16
-matrix:
-  allow_failures:
-  - node_js: "12"
-script:
-  - npm run lint
-  - npm test
-  - npm run check-coverage
-after_script:
-  - cat ./coverage/lcov.info | ./node_modules/.bin/coveralls
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 69ea0d1..bfde969 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,15 @@
 # Change Log for aws-lambda-ses-forwarder
 
+## 6.0.0 [2025/1/11]
+
+- Refactoring code to use AWS SDK for JavaScript v3, which is included with the
+Node.js 18, 20, and 22 Lambda runtimes.
+- Upgrading ESLint and Mocha development dependencies.
+
+### Upgrade Notes
+
+- This version is compatible with the **Node.js 18, 20, or 22** Lambda runtime.
+
 ## 5.1.0 [2023/10/9]
 
 - Updating documentation about using Node.js 16 or 18 AWS Lambda runtimes.
diff --git a/README.md b/README.md
index f6d764e..30aa535 100644
--- a/README.md
+++ b/README.md
@@ -1,8 +1,6 @@
 # AWS Lambda SES Email Forwarder
 
-[![npm version](https://badge.fury.io/js/aws-lambda-ses-forwarder.svg)](https://www.npmjs.com/package/aws-lambda-ses-forwarder)
-[![Travis CI test status](https://travis-ci.org/arithmetric/aws-lambda-ses-forwarder.svg?branch=master)](https://travis-ci.org/arithmetric/aws-lambda-ses-forwarder)
-[![Test coverage status](https://coveralls.io/repos/github/arithmetric/aws-lambda-ses-forwarder/badge.svg?branch=master)](https://coveralls.io/github/arithmetric/aws-lambda-ses-forwarder?branch=master)
+[![npm version](https://img.shields.io/npm/v/aws-lambda-ses-forwarder)](https://www.npmjs.com/package/aws-lambda-ses-forwarder)
 
 A Node.js script for AWS Lambda that uses the inbound/outbound capabilities of
 AWS Simple Email Service (SES) to run a "serverless" email forwarding service.
@@ -59,7 +57,7 @@ the email forwarding mapping from original destinations to new destination.
 2. In AWS Lambda, add a new function and skip selecting a blueprint.
 
  - Name the function "SesForwarder" and optionally give it a description. Ensure
- Runtime is set to Node.js 20.x.
+ Runtime is set to Node.js 22.x. (Node.js 18.x and 20.x can also be used.)
 
  - For the Lambda function code, either copy and paste the contents of
  `index.js` into the inline code editor or zip the contents of the repository
diff --git a/example/package.json b/example/package.json
index df6b3e3..13a7314 100644
--- a/example/package.json
+++ b/example/package.json
@@ -4,6 +4,6 @@
   "description": "Example implementation of aws-lambda-ses-forwarder.",
   "main": "index.js",
   "dependencies": {
-    "aws-lambda-ses-forwarder": "^4.0.0"
+    "aws-lambda-ses-forwarder": "^6.0.0"
   }
 }
diff --git a/package.json b/package.json
index 0807f1b..a866d00 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "aws-lambda-ses-forwarder",
-  "version": "5.1.0",
+  "version": "6.0.0",
   "description": "Serverless email forwarding using AWS Lambda and SES",
   "main": "index.js",
   "scripts": {