diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9e7f606..6056021 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,11 @@ Tous les changements notables apportés à ce projet seront documentés dans ce
 Le format est basé sur [Keep a Changelog](http://keepachangelog.com/fr/1.0.0/)
 et ce projet adhère à [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## [3.1.0] - 2022-12-08
+
+### Corrections
+- Support des variables dans le point d'accès GraphQL
+
 ## [3.0.0] - 2022-07-04
 
 ### Modifications
diff --git a/docker/Dockerfile b/docker/Dockerfile
index ba560ff..1e44e78 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -18,6 +18,7 @@ RUN \
     php -r "unlink('composer-setup.php');"
 
 # install vendors
+ENV COMPOSER_ALLOW_SUPERUSER=1
 RUN php composer.phar install
 
 # run server
diff --git a/docker/app/.gitignore b/docker/app/.gitignore
new file mode 100644
index 0000000..5657f6e
--- /dev/null
+++ b/docker/app/.gitignore
@@ -0,0 +1 @@
+vendor
\ No newline at end of file
diff --git a/docker/app/composer.json b/docker/app/composer.json
index 08b9933..c7688b5 100644
--- a/docker/app/composer.json
+++ b/docker/app/composer.json
@@ -7,7 +7,7 @@
         }
     ],
     "require": {
-        "php": "^7.4",
+        "php": ">=7.4",
         "datatourisme/api": "^3.0"
     }
 }
diff --git a/docker/app/composer.lock b/docker/app/composer.lock
new file mode 100644
index 0000000..ad6d6ce
--- /dev/null
+++ b/docker/app/composer.lock
@@ -0,0 +1,1144 @@
+{
+    "_readme": [
+        "This file locks the dependencies of your project to a known state",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
+        "This file is @generated automatically"
+    ],
+    "content-hash": "80562f51c269b3bc8ea063dcea0ffd59",
+    "packages": [
+        {
+            "name": "datatourisme/api",
+            "version": "3.1.0",
+            "source": {
+                "type": "git",
+                "url": "https://gitlab.adullact.net/adntourisme/datatourisme/api",
+                "reference": "c11c21058cb3386a8d53531a9ec3ada2c4c3bac1"
+            },
+            "require": {
+                "easyrdf/easyrdf": "^1.1.1",
+                "ext-curl": ">=7.4",
+                "ext-dom": ">=7.4",
+                "php": ">=7.4",
+                "symfony/yaml": "^3.0 || ^4.0",
+                "twig/twig": "^2.4",
+                "youshido/graphql": "^1.5.4"
+            },
+            "require-dev": {
+                "friendsofphp/php-cs-fixer": "^2.0",
+                "phpunit/phpunit": "^9",
+                "symfony/var-dumper": "^4.0"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Datatourisme\\Api\\": "src/",
+                    "Tests\\Datatourisme\\Api\\": "tests/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Conjecto",
+                    "email": "contact@conjecto.com"
+                }
+            ],
+            "homepage": "https://www.datatourisme.fr",
+            "keywords": [
+                "api",
+                "datatourisme",
+                "graphql",
+                "opendata",
+                "sparql"
+            ],
+            "support": {
+                "docs": "https://datatourisme.frama.io/api/",
+                "source": "https://framagit.org/datatourisme/api"
+            },
+            "time": "2022-12-08T15:26:28+00:00"
+        },
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+                "url": "https://github.com/easyrdf/easyrdf.git",
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+            },
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+                "phpunit/phpunit": "^7",
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+                "squizlabs/php_codesniffer": "3.*",
+                "zendframework/zend-http": "~2.3"
+            },
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+                    "email": "njh@aelius.com",
+                    "homepage": "http://www.aelius.com/njh/",
+                    "role": "Developer"
+                },
+                {
+                    "name": "Alexey Zakhlestin",
+                    "email": "indeyets@gmail.com",
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+                    "role": "Developer"
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+            "homepage": "http://www.easyrdf.org/",
+            "keywords": [
+                "Linked Data",
+                "RDF",
+                "Semantic Web",
+                "Turtle",
+                "rdfa",
+                "sparql"
+            ],
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+                "forum": "http://groups.google.com/group/easyrdf/",
+                "issues": "http://github.com/easyrdf/easyrdf/issues",
+                "source": "https://github.com/easyrdf/easyrdf/tree/1.1.1"
+            },
+            "time": "2020-12-02T08:47:31+00:00"
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+        },
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+            "version": "v1.27.0",
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+                }
+            },
+            "autoload": {
+                "files": [
+                    "bootstrap.php"
+                ],
+                "psr-4": {
+                    "Symfony\\Polyfill\\Php72\\": ""
+                }
+            },
+            "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": "Symfony polyfill backporting some PHP 7.2+ features to lower PHP versions",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "compatibility",
+                "polyfill",
+                "portable",
+                "shim"
+            ],
+            "support": {
+                "source": "https://github.com/symfony/polyfill-php72/tree/v1.27.0"
+            },
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2022-11-03T14:55:06+00:00"
+        },
+        {
+            "name": "symfony/polyfill-php80",
+            "version": "v1.27.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/polyfill-php80.git",
+                "reference": "7a6ff3f1959bb01aefccb463a0f2cd3d3d2fd936"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/polyfill-php80/zipball/7a6ff3f1959bb01aefccb463a0f2cd3d3d2fd936",
+                "reference": "7a6ff3f1959bb01aefccb463a0f2cd3d3d2fd936",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.1"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "1.27-dev"
+                },
+                "thanks": {
+                    "name": "symfony/polyfill",
+                    "url": "https://github.com/symfony/polyfill"
+                }
+            },
+            "autoload": {
+                "files": [
+                    "bootstrap.php"
+                ],
+                "psr-4": {
+                    "Symfony\\Polyfill\\Php80\\": ""
+                },
+                "classmap": [
+                    "Resources/stubs"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Ion Bazan",
+                    "email": "ion.bazan@gmail.com"
+                },
+                {
+                    "name": "Nicolas Grekas",
+                    "email": "p@tchwork.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony polyfill backporting some PHP 8.0+ features to lower PHP versions",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "compatibility",
+                "polyfill",
+                "portable",
+                "shim"
+            ],
+            "support": {
+                "source": "https://github.com/symfony/polyfill-php80/tree/v1.27.0"
+            },
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2022-11-03T14:55:06+00:00"
+        },
+        {
+            "name": "symfony/property-access",
+            "version": "v4.4.44",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/property-access.git",
+                "reference": "d49682f6f0764df725c95128213a38f7e0a9f358"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/property-access/zipball/d49682f6f0764df725c95128213a38f7e0a9f358",
+                "reference": "d49682f6f0764df725c95128213a38f7e0a9f358",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.1.3",
+                "symfony/inflector": "^3.4|^4.0|^5.0",
+                "symfony/polyfill-php80": "^1.16"
+            },
+            "require-dev": {
+                "symfony/cache": "^3.4|^4.0|^5.0"
+            },
+            "suggest": {
+                "psr/cache-implementation": "To cache access methods."
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Component\\PropertyAccess\\": ""
+                },
+                "exclude-from-classmap": [
+                    "/Tests/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Provides functions to read and write from/to an object or array using a simple string notation",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "access",
+                "array",
+                "extraction",
+                "index",
+                "injection",
+                "object",
+                "property",
+                "property path",
+                "reflection"
+            ],
+            "support": {
+                "source": "https://github.com/symfony/property-access/tree/v4.4.44"
+            },
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2022-06-27T13:16:42+00:00"
+        },
+        {
+            "name": "symfony/string",
+            "version": "v5.4.15",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/string.git",
+                "reference": "571334ce9f687e3e6af72db4d3b2a9431e4fd9ed"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/string/zipball/571334ce9f687e3e6af72db4d3b2a9431e4fd9ed",
+                "reference": "571334ce9f687e3e6af72db4d3b2a9431e4fd9ed",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.2.5",
+                "symfony/polyfill-ctype": "~1.8",
+                "symfony/polyfill-intl-grapheme": "~1.0",
+                "symfony/polyfill-intl-normalizer": "~1.0",
+                "symfony/polyfill-mbstring": "~1.0",
+                "symfony/polyfill-php80": "~1.15"
+            },
+            "conflict": {
+                "symfony/translation-contracts": ">=3.0"
+            },
+            "require-dev": {
+                "symfony/error-handler": "^4.4|^5.0|^6.0",
+                "symfony/http-client": "^4.4|^5.0|^6.0",
+                "symfony/translation-contracts": "^1.1|^2",
+                "symfony/var-exporter": "^4.4|^5.0|^6.0"
+            },
+            "type": "library",
+            "autoload": {
+                "files": [
+                    "Resources/functions.php"
+                ],
+                "psr-4": {
+                    "Symfony\\Component\\String\\": ""
+                },
+                "exclude-from-classmap": [
+                    "/Tests/"
+                ]
+            },
+            "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": "Provides an object-oriented API to strings and deals with bytes, UTF-8 code points and grapheme clusters in a unified way",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "grapheme",
+                "i18n",
+                "string",
+                "unicode",
+                "utf-8",
+                "utf8"
+            ],
+            "support": {
+                "source": "https://github.com/symfony/string/tree/v5.4.15"
+            },
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2022-10-05T15:16:54+00:00"
+        },
+        {
+            "name": "symfony/yaml",
+            "version": "v4.4.45",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/yaml.git",
+                "reference": "aeccc4dc52a9e634f1d1eebeb21eacfdcff1053d"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/yaml/zipball/aeccc4dc52a9e634f1d1eebeb21eacfdcff1053d",
+                "reference": "aeccc4dc52a9e634f1d1eebeb21eacfdcff1053d",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.1.3",
+                "symfony/polyfill-ctype": "~1.8"
+            },
+            "conflict": {
+                "symfony/console": "<3.4"
+            },
+            "require-dev": {
+                "symfony/console": "^3.4|^4.0|^5.0"
+            },
+            "suggest": {
+                "symfony/console": "For validating YAML files using the lint command"
+            },
+            "type": "library",
+            "autoload": {
+                "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": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Loads and dumps YAML files",
+            "homepage": "https://symfony.com",
+            "support": {
+                "source": "https://github.com/symfony/yaml/tree/v4.4.45"
+            },
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2022-08-02T15:47:23+00:00"
+        },
+        {
+            "name": "twig/twig",
+            "version": "v2.15.3",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/twigphp/Twig.git",
+                "reference": "ab402673db8746cb3a4c46f3869d6253699f614a"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/twigphp/Twig/zipball/ab402673db8746cb3a4c46f3869d6253699f614a",
+                "reference": "ab402673db8746cb3a4c46f3869d6253699f614a",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.1.3",
+                "symfony/polyfill-ctype": "^1.8",
+                "symfony/polyfill-mbstring": "^1.3",
+                "symfony/polyfill-php72": "^1.8"
+            },
+            "require-dev": {
+                "psr/container": "^1.0",
+                "symfony/phpunit-bridge": "^4.4.9|^5.0.9|^6.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.15-dev"
+                }
+            },
+            "autoload": {
+                "psr-0": {
+                    "Twig_": "lib/"
+                },
+                "psr-4": {
+                    "Twig\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com",
+                    "homepage": "http://fabien.potencier.org",
+                    "role": "Lead Developer"
+                },
+                {
+                    "name": "Twig Team",
+                    "role": "Contributors"
+                },
+                {
+                    "name": "Armin Ronacher",
+                    "email": "armin.ronacher@active-4.com",
+                    "role": "Project Founder"
+                }
+            ],
+            "description": "Twig, the flexible, fast, and secure template language for PHP",
+            "homepage": "https://twig.symfony.com",
+            "keywords": [
+                "templating"
+            ],
+            "support": {
+                "issues": "https://github.com/twigphp/Twig/issues",
+                "source": "https://github.com/twigphp/Twig/tree/v2.15.3"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/twig/twig",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2022-09-28T08:40:08+00:00"
+        },
+        {
+            "name": "youshido/graphql",
+            "version": "v1.7.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/youshido-php/GraphQL.git",
+                "reference": "ca4cacd72838819ac5ec52ecc9a0a5397304d885"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/youshido-php/GraphQL/zipball/ca4cacd72838819ac5ec52ecc9a0a5397304d885",
+                "reference": "ca4cacd72838819ac5ec52ecc9a0a5397304d885",
+                "shasum": ""
+            },
+            "require": {
+                "ext-mbstring": "*",
+                "php": ">=5.5",
+                "symfony/property-access": "^2.8 || ^3.4 || ^4.4"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^4.8"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Youshido\\GraphQL\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Alexandr Viniychuk",
+                    "email": "a@viniychuk.com"
+                },
+                {
+                    "name": "Portey Vasil",
+                    "email": "portey@gmail.com"
+                }
+            ],
+            "description": "Pure PHP GraphQL",
+            "support": {
+                "issues": "https://github.com/youshido-php/GraphQL/issues",
+                "source": "https://github.com/youshido-php/GraphQL/tree/v1.7.1"
+            },
+            "time": "2019-12-21T09:18:00+00:00"
+        }
+    ],
+    "packages-dev": [],
+    "aliases": [],
+    "minimum-stability": "stable",
+    "stability-flags": [],
+    "prefer-stable": false,
+    "prefer-lowest": false,
+    "platform": {
+        "php": ">=7.4"
+    },
+    "platform-dev": [],
+    "plugin-api-version": "2.3.0"
+}
diff --git a/docker/app/www/index.php b/docker/app/www/index.php
index bd7173d..42e5165 100644
--- a/docker/app/www/index.php
+++ b/docker/app/www/index.php
@@ -11,24 +11,40 @@ switch($_SERVER['REQUEST_METHOD']) {
     case "POST":
         if (isset($_SERVER['CONTENT_TYPE']) && $_SERVER['CONTENT_TYPE'] === 'application/json') {
             $rawBody = file_get_contents('php://input');
-            $requestData = json_decode($rawBody ?: '', true);
+            try {
+                $requestData = json_decode($rawBody ?: '', true, 512, JSON_THROW_ON_ERROR);
+            } catch(\JsonException $e) {
+                http_response_code(400);
+                echo json_encode(['errors' => [['message' => $e->getMessage()]]]);
+                exit;
+            }
         } else {
             $requestData = $_POST;
         }
         break;
     case "GET":
         $requestData = $_GET;
+        if (isset($requestData['variables'])) {
+            try {
+                $requestData['variables'] = json_decode($requestData['variables'], true, 512, JSON_THROW_ON_ERROR);
+            } catch(\JsonException $e) {
+                http_response_code(400);
+                echo json_encode(['errors' => [['message' => 'variables : ' . $e->getMessage()]]]);
+                exit;
+            }
+        }
         break;
     default:
         exit;
 }
 
 $payload = isset($requestData['query']) ? $requestData['query'] : null;
+$variables = !empty($requestData['variables']) ? $requestData['variables'] : [];
 
 require_once __DIR__.'/../vendor/autoload.php';
 
 $processor = \Datatourisme\Api\DatatourismeApi::create('http://blazegraph:9999/blazegraph/namespace/kb/sparql');
-$response = $processor->process($payload);
+$response = $processor->process($payload, $variables);
 header('Content-Type: application/json');
 echo json_encode($response);
 exit;