diff --git a/composer.json b/composer.json
index f44235f..949b74e 100644
--- a/composer.json
+++ b/composer.json
@@ -19,7 +19,7 @@
     "require": {
         "silex/silex": "2.0.*@dev",
         "symfony/config": "~2.4",
-        "symfony/yaml": "~2.0"
+        "symfony/yaml": "~5.4"
     },
     "autoload": {
         "psr-4": {
diff --git a/composer.lock b/composer.lock
index b2f0f0e..aa85acf 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
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         "This file is @generated automatically"
     ],
-    "content-hash": "7ac57c33e3de0b414dd38af9cea0ed6d",
+    "content-hash": "654d8d4af0f48c8473db7c76549beea0",
     "packages": [
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             "name": "pimple/pimple",
@@ -298,6 +298,77 @@
             "abandoned": "symfony/error-handler",
             "time": "2018-11-11T11:18:13+00:00"
         },
+        {
+            "name": "symfony/deprecation-contracts",
+            "version": "v3.7.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/deprecation-contracts.git",
+                "reference": "f3202fa1b5097b0af062dc978b32ecf63404e31d"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/deprecation-contracts/zipball/f3202fa1b5097b0af062dc978b32ecf63404e31d",
+                "reference": "f3202fa1b5097b0af062dc978b32ecf63404e31d",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.1"
+            },
+            "type": "library",
+            "extra": {
+                "thanks": {
+                    "url": "https://github.com/symfony/contracts",
+                    "name": "symfony/contracts"
+                },
+                "branch-alias": {
+                    "dev-main": "3.7-dev"
+                }
+            },
+            "autoload": {
+                "files": [
+                    "function.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Nicolas Grekas",
+                    "email": "p@tchwork.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "A generic function and convention to trigger deprecation notices",
+            "homepage": "https://symfony.com",
+            "support": {
+                "source": "https://github.com/symfony/deprecation-contracts/tree/v3.7.1"
+            },
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://github.com/nicolas-grekas",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2026-06-05T06:23:12+00:00"
+        },
         {
             "name": "symfony/event-dispatcher",
             "version": "v2.8.52",
@@ -547,6 +618,89 @@
             },
             "time": "2016-01-14T10:11:16+00:00"
         },
+        {
+            "name": "symfony/polyfill-ctype",
+            "version": "v1.37.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/polyfill-ctype.git",
+                "reference": "141046a8f9477948ff284fa65be2095baafb94f2"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/polyfill-ctype/zipball/141046a8f9477948ff284fa65be2095baafb94f2",
+                "reference": "141046a8f9477948ff284fa65be2095baafb94f2",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.2"
+            },
+            "provide": {
+                "ext-ctype": "*"
+            },
+            "suggest": {
+                "ext-ctype": "For best performance"
+            },
+            "type": "library",
+            "extra": {
+                "thanks": {
+                    "url": "https://github.com/symfony/polyfill",
+                    "name": "symfony/polyfill"
+                }
+            },
+            "autoload": {
+                "files": [
+                    "bootstrap.php"
+                ],
+                "psr-4": {
+                    "Symfony\\Polyfill\\Ctype\\": ""
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Gert de Pagter",
+                    "email": "BackEndTea@gmail.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony polyfill for ctype functions",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "compatibility",
+                "ctype",
+                "polyfill",
+                "portable"
+            ],
+            "support": {
+                "source": "https://github.com/symfony/polyfill-ctype/tree/v1.37.0"
+            },
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://github.com/nicolas-grekas",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2026-04-10T16:19:22+00:00"
+        },
         {
             "name": "symfony/polyfill-mbstring",
             "version": "v1.29.0",
@@ -833,50 +987,82 @@
         },
         {
             "name": "symfony/yaml",
-            "version": "v2.6.4",
-            "target-dir": "Symfony/Component/Yaml",
+            "version": "v5.4.52",
             "source": {
                 "type": "git",
-                "url": "https://github.com/symfony/Yaml.git",
-                "reference": "60ed7751671113cf1ee7d7778e691642c2e9acd8"
+                "url": "https://github.com/symfony/yaml.git",
+                "reference": "b0b27055f055f0d314c5c68ed0c10f0bbd90aee0"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/Yaml/zipball/60ed7751671113cf1ee7d7778e691642c2e9acd8",
-                "reference": "60ed7751671113cf1ee7d7778e691642c2e9acd8",
+                "url": "https://api.github.com/repos/symfony/yaml/zipball/b0b27055f055f0d314c5c68ed0c10f0bbd90aee0",
+                "reference": "b0b27055f055f0d314c5c68ed0c10f0bbd90aee0",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.3.3"
+                "php": ">=7.2.5",
+                "symfony/deprecation-contracts": "^2.1|^3",
+                "symfony/polyfill-ctype": "^1.8"
             },
-            "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-master": "2.6-dev"
-                }
+            "conflict": {
+                "symfony/console": "<5.3"
+            },
+            "require-dev": {
+                "symfony/console": "^5.3|^6.0"
             },
+            "suggest": {
+                "symfony/console": "For validating YAML files using the lint command"
+            },
+            "bin": [
+                "Resources/bin/yaml-lint"
+            ],
+            "type": "library",
             "autoload": {
-                "psr-0": {
+                "psr-4": {
                     "Symfony\\Component\\Yaml\\": ""
-                }
+                },
+                "exclude-from-classmap": [
+                    "/Tests/"
+                ]
             },
             "notification-url": "https://packagist.org/downloads/",
             "license": [
                 "MIT"
             ],
             "authors": [
+                {
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
+                },
                 {
                     "name": "Symfony Community",
-                    "homepage": "http://symfony.com/contributors"
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Loads and dumps YAML files",
+            "homepage": "https://symfony.com",
+            "support": {
+                "source": "https://github.com/symfony/yaml/tree/v5.4.52"
+            },
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
                 },
                 {
-                    "name": "Fabien Potencier",
-                    "email": "fabien@symfony.com"
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://github.com/nicolas-grekas",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
                 }
             ],
-            "description": "Symfony Yaml Component",
-            "homepage": "http://symfony.com",
-            "time": "2015-01-25T04:39:26+00:00"
+            "time": "2026-05-15T06:40:16+00:00"
         }
     ],
     "packages-dev": [],
@@ -887,7 +1073,7 @@
     },
     "prefer-stable": false,
     "prefer-lowest": false,
-    "platform": [],
-    "platform-dev": [],
-    "plugin-api-version": "2.6.0"
+    "platform": {},
+    "platform-dev": {},
+    "plugin-api-version": "2.9.0"
 }