diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 53eaccf..22458cf 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -32,6 +32,7 @@ jobs:
         php-version:
           - '8.2'
           - '8.3'
+          - '8.4'
     steps:
       - name: Set up PHP
         uses: shivammathur/setup-php@c541c155eee45413f5b09a52248675b1a2575231
diff --git a/.gitignore b/.gitignore
index 4a48896..3ad5da3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@ composer.phar
 vendor/
 .phpunit.result.cache
 composer.lock
+.tool-versions
diff --git a/.tool-versions b/.tool-versions
deleted file mode 100644
index f0bbab3..0000000
--- a/.tool-versions
+++ /dev/null
@@ -1 +0,0 @@
-php 8.3.3
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 709d493..e49e401 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,8 @@ This project uses [Semantic Versioning 2.0.0](http://semver.org/).
 
 - NEW: Added `aliasEmail` and `destinationEmail` to `EmailForward`
 - CHANGED: Deprecated `from` and `to` fields in `EmailForward`
+- CHANGED: `DomainCollaborators` have been deprecated and will be removed in the next major version. Please use our Domain Access Control feature.
+- CHANGED: Add support for PHP 8.4
 
 ## 2.0.0
 
diff --git a/LICENSE.txt b/LICENSE.txt
index 7c5d936..ffc0c2c 100644
--- a/LICENSE.txt
+++ b/LICENSE.txt
@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2015-2022 DNSimple Corporation
+Copyright (c) 2015-2024 DNSimple Corporation
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/README.md b/README.md
index 7706679..46935dc 100644
--- a/README.md
+++ b/README.md
@@ -67,4 +67,4 @@ Contibutions are welcomed. Please open an issue to discuss the changes before op
 
 ## License
 
-Copyright (c) 2015-2022 DNSimple Corporation. This is Free Software distributed under the MIT license.
+Copyright (c) 2015-2024 DNSimple Corporation. This is Free Software distributed under the MIT license.
diff --git a/src/Dnsimple/Service/Domains.php b/src/Dnsimple/Service/Domains.php
index d3dd385..43b0071 100644
--- a/src/Dnsimple/Service/Domains.php
+++ b/src/Dnsimple/Service/Domains.php
@@ -99,6 +99,7 @@ public function deleteDomain($account, $domain): Response
      * @param array $options key/value options to sort and filter the results
      * @return Response The list of collaborators
      * @throws DnsimpleException When something goes wrong
+     * @deprecated `DomainCollaborators` have been deprecated and will be removed in the next major version. Please use our Domain Access Control feature.
      */
     public function listCollaborators($account, $domain, array $options = []): Response
     {
@@ -124,6 +125,7 @@ public function listCollaborators($account, $domain, array $options = []): Respo
      * @param array $attributes The collaborator attributes. Refer to the documentation for the list of available fields.
      * @return Response The collaborator added to the domain in the account
      * @throws DnsimpleException When something goes wrong
+     * @deprecated `DomainCollaborators` have been deprecated and will be removed in the next major version. Please use our Domain Access Control feature.
      */
     public function addCollaborator($account, $domain, array $attributes): Response
     {
@@ -141,6 +143,7 @@ public function addCollaborator($account, $domain, array $attributes): Response
      * @param int $collaborator The collaborator id
      * @return Response An empty response
      * @throws DnsimpleException When something goes wrong
+     * @deprecated `DomainCollaborators` have been deprecated and will be removed in the next major version. Please use our Domain Access Control feature.
      */
     public function removeCollaborator($account, $domain, $collaborator): Response
     {