diff --git a/.ddev/config.yaml b/.ddev/config.yaml
index 3273e5c9..a1401463 100644
--- a/.ddev/config.yaml
+++ b/.ddev/config.yaml
@@ -1,7 +1,7 @@
 name: frontend-asset-handler
 type: php
 docroot: ""
-php_version: "8.1"
+php_version: "8.4"
 webserver_type: nginx-fpm
 router_http_port: "80"
 router_https_port: "443"
diff --git a/.github/workflows/cgl.yaml b/.github/workflows/cgl.yaml
index 5bf6a342..e23a68af 100644
--- a/.github/workflows/cgl.yaml
+++ b/.github/workflows/cgl.yaml
@@ -19,6 +19,7 @@ jobs:
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
         with:
+          # @todo Use PHP 8.4 once PHP-CS-Fixer supports PHP 8.4
           php-version: 8.3
           tools: composer:v2, composer-require-checker, composer-unused, cs2pr
           coverage: none
diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index 599f19e1..f6a8f647 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -14,7 +14,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php-version: ["8.1", "8.2", "8.3"]
+        php-version: ["8.1", "8.2", "8.3", "8.4"]
         dependencies: ["locked", "highest", "lowest"]
     steps:
       - uses: actions/checkout@v4
@@ -51,7 +51,7 @@ jobs:
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: 8.3
+          php-version: 8.4
           tools: composer:v2
           coverage: pcov
 
diff --git a/composer.json b/composer.json
index 7efd2e30..7ee8c069 100644
--- a/composer.json
+++ b/composer.json
@@ -12,7 +12,7 @@
 		}
 	],
 	"require": {
-		"php": "~8.1.0 || ~8.2.0 || ~8.3.0",
+		"php": "~8.1.0 || ~8.2.0 || ~8.3.0 || ~8.4.0",
 		"ext-filter": "*",
 		"ext-json": "*",
 		"ext-mbstring": "*",
diff --git a/composer.lock b/composer.lock
index bb482da3..d73fd3de 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": "b4a2eadeb4d74ac577a490eb3f15993f",
+    "content-hash": "a98f325cd2d1c5385e932160c1ae07e1",
     "packages": [
         {
             "name": "ergebnis/json",
@@ -6534,7 +6534,7 @@
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
-        "php": "~8.1.0 || ~8.2.0 || ~8.3.0",
+        "php": "~8.1.0 || ~8.2.0 || ~8.3.0 || ~8.4.0",
         "ext-filter": "*",
         "ext-json": "*",
         "ext-mbstring": "*",
diff --git a/rector.php b/rector.php
index c2c301d9..af925415 100644
--- a/rector.php
+++ b/rector.php
@@ -22,8 +22,6 @@
  */
 
 use Rector\Config\RectorConfig;
-use Rector\Php73\Rector\FuncCall\JsonThrowOnErrorRector;
-use Rector\Php74\Rector\LNumber\AddLiteralSeparatorToNumberRector;
 use Rector\Php81\Rector\FuncCall\NullToStrictStringFuncCallArgRector;
 use Rector\Set\ValueObject\LevelSetList;
 
@@ -34,8 +32,6 @@
     ]);
 
     $rectorConfig->skip([
-        AddLiteralSeparatorToNumberRector::class,
-        JsonThrowOnErrorRector::class,
         NullToStrictStringFuncCallArgRector::class => [
             __DIR__.'/src/Command/FetchAssetsCommand.php',
             __DIR__.'/src/Command/InspectAssetsCommand.php',
diff --git a/src/Command/ConfigAssetsCommand.php b/src/Command/ConfigAssetsCommand.php
index 604c149c..3d01b78d 100644
--- a/src/Command/ConfigAssetsCommand.php
+++ b/src/Command/ConfigAssetsCommand.php
@@ -286,7 +286,7 @@ private function doWrite(Config\Config $config, string $path, mixed $newValue):
      */
     private function buildAndValidatePath(array $assetDefinitions, string $path): string
     {
-        $pathSegments = str_getcsv($path, '/');
+        $pathSegments = str_getcsv($path, '/', escape: '\\');
         $strictPath = is_numeric($pathSegments[0]);
 
         if (!$strictPath) {
diff --git a/src/Helper/ArrayHelper.php b/src/Helper/ArrayHelper.php
index a55e22e8..d61ae8bd 100644
--- a/src/Helper/ArrayHelper.php
+++ b/src/Helper/ArrayHelper.php
@@ -98,7 +98,7 @@ public static function setArrayValueByPath(array $array, string $path, mixed $va
         $node = &$array;
 
         // Assure required structure in array
-        foreach (str_getcsv($path, '/') as $segment) {
+        foreach (str_getcsv($path, '/', escape: '\\') as $segment) {
             if (!isset($node[$segment])) {
                 $node[$segment] = [];
             }