diff --git a/.github/workflows/unit.yml b/.github/workflows/unit.yml
index 6e279ca..dd271ed 100644
--- a/.github/workflows/unit.yml
+++ b/.github/workflows/unit.yml
@@ -10,26 +10,29 @@ jobs:
       matrix:
         include:
           - php: "8.0"
-            os: macos-13
+            os: macos-latest
           - php: "8.0"
             mode: high-deps
-            os: ubuntu-20.04
+            os: ubuntu-latest
           - php: "8.1"
-            os: ubuntu-20.04
+            os: ubuntu-latest
           - php: "8.1"
             mode: low-deps
-            os: ubuntu-20.04
+            os: ubuntu-latest
           - php: "8.2"
-            os: ubuntu-20.04
+            os: ubuntu-latest
           - php: "8.2"
-            os: ubuntu-20.04
+            os: ubuntu-latest
             mode: low-deps
           - php: "8.3"
             mode: experimental
-            os: ubuntu-20.04
+            os: ubuntu-latest
           - php: "8.4"
             mode: experimental
-            os: ubuntu-20.04
+            os: ubuntu-latest
+          - php: "8.5"
+            mode: experimental
+            os: ubuntu-latest
       fail-fast: false
 
     runs-on: "${{ matrix.os }}"
diff --git a/README.md b/README.md
index b0d610b..57efdde 100644
--- a/README.md
+++ b/README.md
@@ -20,7 +20,7 @@ Developed by [Florian Eckerstorfer](https://florian.ec) in Vienna, Europe with t
 -   Provides custom replacements for Arabic, Austrian, Azerbaijani, Brazilian Portuguese, Bulgarian, Burmese, Chinese, Croatian, Czech, Esperanto, Estonian, Finnish, French, Georgian, German, Greek, Hindi, Hungarian, Italian, Latvian, Lithuanian, Macedonian, Norwegian, Polish, Romanian, Russian, Serbian, Spanish, Swedish, Turkish, Ukrainian, Vietnamese and Yiddish special characters. Instead of removing these characters, Slugify approximates them (e.g., `ae` replaces `ä`).
 -   No external dependencies.
 -   PSR-4 compatible.
--   Compatible with PHP >= 8.
+-   Compatible with PHP 8.0 - 8.5.
 -   Integrations for [Symfony (3, 4 and 5)](http://symfony.com), [Laravel](http://laravel.com), [Twig (2 and 3)](http://twig.sensiolabs.org), [Zend Framework 2](http://framework.zend.com/), [Nette Framework](http://nette.org/), [Latte](http://latte.nette.org/) and [Plum](https://github.com/plumphp/plum).
 
 ## Installation
diff --git a/composer.json b/composer.json
index c6ae6ae..0a9dfe0 100644
--- a/composer.json
+++ b/composer.json
@@ -19,7 +19,7 @@
         }
     ],
     "require": {
-        "php": "~8.0.0 || ~8.1.0 || ~8.2.0 || ~8.3.0 || ~8.4.0",
+        "php": "~8.0.0 || ~8.1.0 || ~8.2.0 || ~8.3.0 || ~8.4.0 || ~8.5.0",
         "ext-mbstring": "*"
     },
     "conflict": {