diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index a2a1950..b145224 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -25,7 +25,7 @@ jobs:
 
       - uses: shivammathur/setup-php@v2
         with:
-          php-version: '8.4'
+          php-version: '8.5'
           coverage: xdebug
       - uses: ramsey/composer-install@v3
 
@@ -68,7 +68,7 @@ jobs:
       - uses: shivammathur/setup-php@v2
         id: setup-php
         with:
-          php-version: '8.4'
+          php-version: '8.5'
           coverage: none
           tools: box:4
       - uses: ramsey/composer-install@v3
diff --git a/.github/workflows/update-version-data.yml b/.github/workflows/update-version-data.yml
index 4501854..82df17f 100644
--- a/.github/workflows/update-version-data.yml
+++ b/.github/workflows/update-version-data.yml
@@ -22,7 +22,7 @@ jobs:
 
       - uses: shivammathur/setup-php@v2
         with:
-          php-version: '8.4'
+          php-version: '8.5'
           coverage: none
 
       - uses: actions/setup-go@v6
diff --git a/composer.json b/composer.json
index a93394a..ccd7d9e 100644
--- a/composer.json
+++ b/composer.json
@@ -28,7 +28,7 @@
     "security": "https://github.com/typisttech/php-matrix/security"
   },
   "require": {
-    "php": "^8.4",
+    "php": "^8.5",
     "composer-runtime-api": "^2.2",
     "composer/semver": "^3.4",
     "guzzlehttp/guzzle": "^7.10",
diff --git a/composer.lock b/composer.lock
index 6f45399..18258a0 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "a30de2a4a1940747be0195d81fee04f7",
+    "content-hash": "67dddbe3daac227d91a93db499d3978f",
     "packages": [
         {
             "name": "composer/semver",
@@ -4990,9 +4990,9 @@
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
-        "php": "^8.4",
+        "php": "^8.5",
         "composer-runtime-api": "^2.2"
     },
     "platform-dev": {},
-    "plugin-api-version": "2.6.0"
+    "plugin-api-version": "2.9.0"
 }
diff --git a/craft.yml b/craft.yml
index dc2e87d..432a001 100644
--- a/craft.yml
+++ b/craft.yml
@@ -1,4 +1,4 @@
-php-version: 8.4
+php-version: 8.5
 extensions:
   - phar
   - filter # For Symfony CompleteCommand
diff --git a/src/Versions.php b/src/Versions.php
index ccb64e1..81e09d1 100644
--- a/src/Versions.php
+++ b/src/Versions.php
@@ -25,13 +25,13 @@ public static function lowest(string ...$versions): string
     {
         $sorted = self::sort(...$versions);
 
-        return $sorted[0];
+        return (string) array_first($sorted);
     }
 
     public static function highest(string ...$versions): string
     {
         $sorted = self::sort(...$versions);
 
-        return $sorted[array_key_last($sorted)];
+        return (string) array_last($sorted);
     }
 }