diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
deleted file mode 100644
index 7543cf1..0000000
--- a/.github/workflows/ci.yml
+++ /dev/null
@@ -1,32 +0,0 @@
-name: CI
-
-on:
-  push:
-    branches: [ master ]
-  pull_request:
-    branches: [ master ]
-
-jobs:
-  build:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2
-
-      - name: Validate composer.json and composer.lock
-        run: composer validate
-
-      - name: Cache Composer packages
-        id: composer-cache
-        uses: actions/cache@v2
-        with:
-          path: vendor
-          key: ${{ runner.os }}-php-${{ hashFiles('**/composer.lock') }}
-          restore-keys: |
-            ${{ runner.os }}-php-
-
-      - name: Install dependencies
-        if: steps.composer-cache.outputs.cache-hit != 'true'
-        run: composer install --prefer-dist --no-progress --no-suggest
-
-      - name: Run test suite
-        run: composer run-script test
diff --git a/composer.json b/composer.json
index 9c2b88c..b9e1fc4 100644
--- a/composer.json
+++ b/composer.json
@@ -8,14 +8,9 @@
             "email": "qferrer@outook.com"
         }
     ],
-    "repositories": [
-        {
-            "type": "vcs",
-            "url": "https://github.com/qferr/mjml-php"
-        }
-    ],
     "require": {
-        "twig/twig": "~2.0",
+        "php": ">=7.2",
+        "twig/twig": "^2.0|^3.0",
         "qferr/mjml-php": "~1.0"
     },
     "require-dev": {
@@ -28,5 +23,10 @@
         "psr-4": {
             "Qferrer\\" : "src/"
         }
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "Qferrer\\Tests\\" : "tests/"
+        }
     }
 }
diff --git a/composer.lock b/composer.lock
index 01c00f1..31bef3e 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,41 +4,47 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "ecf3449bb1f6c197e061dfc51da9aa48",
+    "content-hash": "b3b58d730cdd7a2a4ab2716dd9eb7bc4",
     "packages": [
         {
             "name": "guzzlehttp/guzzle",
-            "version": "6.5.5",
+            "version": "7.2.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/guzzle/guzzle.git",
-                "reference": "9d4290de1cfd701f38099ef7e183b64b4b7b0c5e"
+                "reference": "0aa74dfb41ae110835923ef10a9d803a22d50e79"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/guzzle/guzzle/zipball/9d4290de1cfd701f38099ef7e183b64b4b7b0c5e",
-                "reference": "9d4290de1cfd701f38099ef7e183b64b4b7b0c5e",
+                "url": "https://api.github.com/repos/guzzle/guzzle/zipball/0aa74dfb41ae110835923ef10a9d803a22d50e79",
+                "reference": "0aa74dfb41ae110835923ef10a9d803a22d50e79",
                 "shasum": ""
             },
             "require": {
                 "ext-json": "*",
-                "guzzlehttp/promises": "^1.0",
-                "guzzlehttp/psr7": "^1.6.1",
-                "php": ">=5.5",
-                "symfony/polyfill-intl-idn": "^1.17.0"
+                "guzzlehttp/promises": "^1.4",
+                "guzzlehttp/psr7": "^1.7",
+                "php": "^7.2.5 || ^8.0",
+                "psr/http-client": "^1.0"
+            },
+            "provide": {
+                "psr/http-client-implementation": "1.0"
             },
             "require-dev": {
                 "ext-curl": "*",
-                "phpunit/phpunit": "^4.8.35 || ^5.7 || ^6.4 || ^7.0",
+                "php-http/client-integration-tests": "^3.0",
+                "phpunit/phpunit": "^8.5.5 || ^9.3.5",
                 "psr/log": "^1.1"
             },
             "suggest": {
+                "ext-curl": "Required for CURL handler support",
+                "ext-intl": "Required for Internationalized Domain Name (IDN) support",
                 "psr/log": "Required for using the Log middleware"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "6.5-dev"
+                    "dev-master": "7.1-dev"
                 }
             },
             "autoload": {
@@ -58,6 +64,11 @@
                     "name": "Michael Dowling",
                     "email": "mtdowling@gmail.com",
                     "homepage": "https://github.com/mtdowling"
+                },
+                {
+                    "name": "Márk Sági-Kazár",
+                    "email": "mark.sagikazar@gmail.com",
+                    "homepage": "https://sagikazarmark.hu"
                 }
             ],
             "description": "Guzzle is a PHP HTTP client library",
@@ -68,30 +79,50 @@
                 "framework",
                 "http",
                 "http client",
+                "psr-18",
+                "psr-7",
                 "rest",
                 "web service"
             ],
-            "time": "2020-06-16T21:01:06+00:00"
+            "funding": [
+                {
+                    "url": "https://github.com/GrahamCampbell",
+                    "type": "github"
+                },
+                {
+                    "url": "https://github.com/Nyholm",
+                    "type": "github"
+                },
+                {
+                    "url": "https://github.com/alexeyshockov",
+                    "type": "github"
+                },
+                {
+                    "url": "https://github.com/gmponos",
+                    "type": "github"
+                }
+            ],
+            "time": "2020-10-10T11:47:56+00:00"
         },
         {
             "name": "guzzlehttp/promises",
-            "version": "v1.3.1",
+            "version": "1.4.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/guzzle/promises.git",
-                "reference": "a59da6cf61d80060647ff4d3eb2c03a2bc694646"
+                "reference": "8e7d04f1f6450fef59366c399cfad4b9383aa30d"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/guzzle/promises/zipball/a59da6cf61d80060647ff4d3eb2c03a2bc694646",
-                "reference": "a59da6cf61d80060647ff4d3eb2c03a2bc694646",
+                "url": "https://api.github.com/repos/guzzle/promises/zipball/8e7d04f1f6450fef59366c399cfad4b9383aa30d",
+                "reference": "8e7d04f1f6450fef59366c399cfad4b9383aa30d",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.5.0"
+                "php": ">=5.5"
             },
             "require-dev": {
-                "phpunit/phpunit": "^4.0"
+                "symfony/phpunit-bridge": "^4.4 || ^5.1"
             },
             "type": "library",
             "extra": {
@@ -122,20 +153,20 @@
             "keywords": [
                 "promise"
             ],
-            "time": "2016-12-20T10:07:11+00:00"
+            "time": "2021-03-07T09:25:29+00:00"
         },
         {
             "name": "guzzlehttp/psr7",
-            "version": "1.6.1",
+            "version": "1.7.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/guzzle/psr7.git",
-                "reference": "239400de7a173fe9901b9ac7c06497751f00727a"
+                "reference": "53330f47520498c0ae1f61f7e2c90f55690c06a3"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/guzzle/psr7/zipball/239400de7a173fe9901b9ac7c06497751f00727a",
-                "reference": "239400de7a173fe9901b9ac7c06497751f00727a",
+                "url": "https://api.github.com/repos/guzzle/psr7/zipball/53330f47520498c0ae1f61f7e2c90f55690c06a3",
+                "reference": "53330f47520498c0ae1f61f7e2c90f55690c06a3",
                 "shasum": ""
             },
             "require": {
@@ -148,15 +179,15 @@
             },
             "require-dev": {
                 "ext-zlib": "*",
-                "phpunit/phpunit": "~4.8.36 || ^5.7.27 || ^6.5.8"
+                "phpunit/phpunit": "~4.8.36 || ^5.7.27 || ^6.5.14 || ^7.5.20 || ^8.5.8 || ^9.3.10"
             },
             "suggest": {
-                "zendframework/zend-httphandlerrunner": "Emit PSR-7 responses"
+                "laminas/laminas-httphandlerrunner": "Emit PSR-7 responses"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.6-dev"
+                    "dev-master": "1.7-dev"
                 }
             },
             "autoload": {
@@ -193,7 +224,56 @@
                 "uri",
                 "url"
             ],
-            "time": "2019-07-01T23:21:34+00:00"
+            "time": "2020-09-30T07:37:11+00:00"
+        },
+        {
+            "name": "psr/http-client",
+            "version": "1.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/http-client.git",
+                "reference": "2dfb5f6c5eff0e91e20e913f8c5452ed95b86621"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/php-fig/http-client/zipball/2dfb5f6c5eff0e91e20e913f8c5452ed95b86621",
+                "reference": "2dfb5f6c5eff0e91e20e913f8c5452ed95b86621",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.0 || ^8.0",
+                "psr/http-message": "^1.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Psr\\Http\\Client\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "http://www.php-fig.org/"
+                }
+            ],
+            "description": "Common interface for HTTP clients",
+            "homepage": "https://github.com/php-fig/http-client",
+            "keywords": [
+                "http",
+                "http-client",
+                "psr",
+                "psr-18"
+            ],
+            "time": "2020-06-29T06:28:15+00:00"
         },
         {
             "name": "psr/http-message",
@@ -247,22 +327,25 @@
         },
         {
             "name": "qferr/mjml-php",
-            "version": "1.0.0",
+            "version": "1.1.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/qferr/mjml-php.git",
-                "reference": "0c14879b883e8ac996b23cd790f77f1974b341f3"
+                "reference": "c6ea36c190e304e399a957f7e03b5a378faf41b9"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/qferr/mjml-php/zipball/0c14879b883e8ac996b23cd790f77f1974b341f3",
-                "reference": "0c14879b883e8ac996b23cd790f77f1974b341f3",
+                "url": "https://api.github.com/repos/qferr/mjml-php/zipball/c6ea36c190e304e399a957f7e03b5a378faf41b9",
+                "reference": "c6ea36c190e304e399a957f7e03b5a378faf41b9",
                 "shasum": ""
             },
             "require": {
-                "guzzlehttp/guzzle": "~6.0",
+                "guzzlehttp/guzzle": "~6.0|~7.0",
                 "php": ">=7.2",
-                "symfony/process": "~4.0"
+                "symfony/process": "~4.0|~5.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "~7.0"
             },
             "type": "library",
             "autoload": {
@@ -270,17 +353,14 @@
                     "Qferrer\\": "src/"
                 }
             },
+            "notification-url": "https://packagist.org/downloads/",
             "authors": [
                 {
                     "name": "Quentin",
                     "email": "qferrer@outook.com"
                 }
             ],
-            "support": {
-                "source": "https://github.com/qferr/mjml-php/tree/master",
-                "issues": "https://github.com/qferr/mjml-php/issues"
-            },
-            "time": "2020-04-02T15:15:36+00:00"
+            "time": "2021-03-19T19:03:44+00:00"
         },
         {
             "name": "ralouphie/getallheaders",
@@ -324,20 +404,20 @@
         },
         {
             "name": "symfony/polyfill-ctype",
-            "version": "v1.17.1",
+            "version": "v1.22.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-ctype.git",
-                "reference": "2edd75b8b35d62fd3eeabba73b26b8f1f60ce13d"
+                "reference": "c6c942b1ac76c82448322025e084cadc56048b4e"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-ctype/zipball/2edd75b8b35d62fd3eeabba73b26b8f1f60ce13d",
-                "reference": "2edd75b8b35d62fd3eeabba73b26b8f1f60ce13d",
+                "url": "https://api.github.com/repos/symfony/polyfill-ctype/zipball/c6c942b1ac76c82448322025e084cadc56048b4e",
+                "reference": "c6c942b1ac76c82448322025e084cadc56048b4e",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.3.3"
+                "php": ">=7.1"
             },
             "suggest": {
                 "ext-ctype": "For best performance"
@@ -345,7 +425,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.17-dev"
+                    "dev-main": "1.22-dev"
                 },
                 "thanks": {
                     "name": "symfony/polyfill",
@@ -396,104 +476,24 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2020-06-06T08:46:27+00:00"
-        },
-        {
-            "name": "symfony/polyfill-intl-idn",
-            "version": "v1.17.1",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/symfony/polyfill-intl-idn.git",
-                "reference": "a57f8161502549a742a63c09f0a604997bf47027"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-intl-idn/zipball/a57f8161502549a742a63c09f0a604997bf47027",
-                "reference": "a57f8161502549a742a63c09f0a604997bf47027",
-                "shasum": ""
-            },
-            "require": {
-                "php": ">=5.3.3",
-                "symfony/polyfill-mbstring": "^1.3",
-                "symfony/polyfill-php72": "^1.10"
-            },
-            "suggest": {
-                "ext-intl": "For best performance"
-            },
-            "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-master": "1.17-dev"
-                },
-                "thanks": {
-                    "name": "symfony/polyfill",
-                    "url": "https://github.com/symfony/polyfill"
-                }
-            },
-            "autoload": {
-                "psr-4": {
-                    "Symfony\\Polyfill\\Intl\\Idn\\": ""
-                },
-                "files": [
-                    "bootstrap.php"
-                ]
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Laurent Bassin",
-                    "email": "laurent@bassin.info"
-                },
-                {
-                    "name": "Symfony Community",
-                    "homepage": "https://symfony.com/contributors"
-                }
-            ],
-            "description": "Symfony polyfill for intl's idn_to_ascii and idn_to_utf8 functions",
-            "homepage": "https://symfony.com",
-            "keywords": [
-                "compatibility",
-                "idn",
-                "intl",
-                "polyfill",
-                "portable",
-                "shim"
-            ],
-            "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": "2020-06-06T08:46:27+00:00"
+            "time": "2021-01-07T16:49:33+00:00"
         },
         {
             "name": "symfony/polyfill-mbstring",
-            "version": "v1.17.1",
+            "version": "v1.22.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-mbstring.git",
-                "reference": "7110338d81ce1cbc3e273136e4574663627037a7"
+                "reference": "5232de97ee3b75b0360528dae24e73db49566ab1"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/7110338d81ce1cbc3e273136e4574663627037a7",
-                "reference": "7110338d81ce1cbc3e273136e4574663627037a7",
+                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/5232de97ee3b75b0360528dae24e73db49566ab1",
+                "reference": "5232de97ee3b75b0360528dae24e73db49566ab1",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.3.3"
+                "php": ">=7.1"
             },
             "suggest": {
                 "ext-mbstring": "For best performance"
@@ -501,7 +501,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.17-dev"
+                    "dev-main": "1.22-dev"
                 },
                 "thanks": {
                     "name": "symfony/polyfill",
@@ -553,37 +553,44 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2020-06-06T08:46:27+00:00"
+            "time": "2021-01-22T09:19:47+00:00"
         },
         {
-            "name": "symfony/polyfill-php72",
-            "version": "v1.17.0",
+            "name": "symfony/polyfill-php80",
+            "version": "v1.22.1",
             "source": {
                 "type": "git",
-                "url": "https://github.com/symfony/polyfill-php72.git",
-                "reference": "f048e612a3905f34931127360bdd2def19a5e582"
+                "url": "https://github.com/symfony/polyfill-php80.git",
+                "reference": "dc3063ba22c2a1fd2f45ed856374d79114998f91"
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             "dist": {
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-                "url": "https://api.github.com/repos/symfony/polyfill-php72/zipball/f048e612a3905f34931127360bdd2def19a5e582",
-                "reference": "f048e612a3905f34931127360bdd2def19a5e582",
+                "url": "https://api.github.com/repos/symfony/polyfill-php80/zipball/dc3063ba22c2a1fd2f45ed856374d79114998f91",
+                "reference": "dc3063ba22c2a1fd2f45ed856374d79114998f91",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.3.3"
+                "php": ">=7.1"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.17-dev"
+                    "dev-main": "1.22-dev"
+                },
+                "thanks": {
+                    "name": "symfony/polyfill",
+                    "url": "https://github.com/symfony/polyfill"
                 }
             },
             "autoload": {
                 "psr-4": {
-                    "Symfony\\Polyfill\\Php72\\": ""
+                    "Symfony\\Polyfill\\Php80\\": ""
                 },
                 "files": [
                     "bootstrap.php"
+                ],
+                "classmap": [
+                    "Resources/stubs"
                 ]
             },
             "notification-url": "https://packagist.org/downloads/",
@@ -591,6 +598,10 @@
                 "MIT"
             ],
             "authors": [
+                {
+                    "name": "Ion Bazan",
+                    "email": "ion.bazan@gmail.com"
+                },
                 {
                     "name": "Nicolas Grekas",
                     "email": "p@tchwork.com"
@@ -600,7 +611,7 @@
                     "homepage": "https://symfony.com/contributors"
                 }
             ],
-            "description": "Symfony polyfill backporting some PHP 7.2+ features to lower PHP versions",
+            "description": "Symfony polyfill backporting some PHP 8.0+ features to lower PHP versions",
             "homepage": "https://symfony.com",
             "keywords": [
                 "compatibility",
@@ -622,31 +633,27 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2020-05-12T16:47:27+00:00"
+            "time": "2021-01-07T16:49:33+00:00"
         },
         {
             "name": "symfony/process",
-            "version": "v4.4.10",
+            "version": "v5.2.4",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/process.git",
-                "reference": "c714958428a85c86ab97e3a0c96db4c4f381b7f5"
+                "reference": "313a38f09c77fbcdc1d223e57d368cea76a2fd2f"
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             "dist": {
                 "type": "zip",
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-            "time": "2018-07-12T15:12:46+00:00"
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2020-11-30T08:04:30+00:00"
         },
         {
             "name": "sebastian/diff",
-            "version": "3.0.2",
+            "version": "3.0.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/diff.git",
-                "reference": "720fcc7e9b5cf384ea68d9d930d480907a0c1a29"
+                "reference": "14f72dd46eaf2f2293cbe79c93cc0bc43161a211"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/diff/zipball/720fcc7e9b5cf384ea68d9d930d480907a0c1a29",
-                "reference": "720fcc7e9b5cf384ea68d9d930d480907a0c1a29",
+                "url": "https://api.github.com/repos/sebastianbergmann/diff/zipball/14f72dd46eaf2f2293cbe79c93cc0bc43161a211",
+                "reference": "14f72dd46eaf2f2293cbe79c93cc0bc43161a211",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.1"
+                "php": ">=7.1"
             },
             "require-dev": {
                 "phpunit/phpunit": "^7.5 || ^8.0",
@@ -1666,13 +1711,13 @@
                 "BSD-3-Clause"
             ],
             "authors": [
-                {
-                    "name": "Kore Nordmann",
-                    "email": "mail@kore-nordmann.de"
-                },
                 {
                     "name": "Sebastian Bergmann",
                     "email": "sebastian@phpunit.de"
+                },
+                {
+                    "name": "Kore Nordmann",
+                    "email": "mail@kore-nordmann.de"
                 }
             ],
             "description": "Diff implementation",
@@ -1683,24 +1728,30 @@
                 "unidiff",
                 "unified diff"
             ],
-            "time": "2019-02-04T06:01:07+00:00"
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2020-11-30T07:59:04+00:00"
         },
         {
             "name": "sebastian/environment",
-            "version": "4.2.3",
+            "version": "4.2.4",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/environment.git",
-                "reference": "464c90d7bdf5ad4e8a6aea15c091fec0603d4368"
+                "reference": "d47bbbad83711771f167c72d4e3f25f7fcc1f8b0"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/environment/zipball/464c90d7bdf5ad4e8a6aea15c091fec0603d4368",
-                "reference": "464c90d7bdf5ad4e8a6aea15c091fec0603d4368",
+                "url": "https://api.github.com/repos/sebastianbergmann/environment/zipball/d47bbbad83711771f167c72d4e3f25f7fcc1f8b0",
+                "reference": "d47bbbad83711771f167c72d4e3f25f7fcc1f8b0",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.1"
+                "php": ">=7.1"
             },
             "require-dev": {
                 "phpunit/phpunit": "^7.5"
@@ -1736,24 +1787,30 @@
                 "environment",
                 "hhvm"
             ],
-            "time": "2019-11-20T08:46:58+00:00"
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2020-11-30T07:53:42+00:00"
         },
         {
             "name": "sebastian/exporter",
-            "version": "3.1.2",
+            "version": "3.1.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/exporter.git",
-                "reference": "68609e1261d215ea5b21b7987539cbfbe156ec3e"
+                "reference": "6b853149eab67d4da22291d36f5b0631c0fd856e"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/exporter/zipball/68609e1261d215ea5b21b7987539cbfbe156ec3e",
-                "reference": "68609e1261d215ea5b21b7987539cbfbe156ec3e",
+                "url": "https://api.github.com/repos/sebastianbergmann/exporter/zipball/6b853149eab67d4da22291d36f5b0631c0fd856e",
+                "reference": "6b853149eab67d4da22291d36f5b0631c0fd856e",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.0",
+                "php": ">=7.0",
                 "sebastian/recursion-context": "^3.0"
             },
             "require-dev": {
@@ -1803,7 +1860,13 @@
                 "export",
                 "exporter"
             ],
-            "time": "2019-09-14T09:02:43+00:00"
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2020-11-30T07:47:53+00:00"
         },
         {
             "name": "sebastian/global-state",
@@ -1858,20 +1921,20 @@
         },
         {
             "name": "sebastian/object-enumerator",
-            "version": "3.0.3",
+            "version": "3.0.4",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/object-enumerator.git",
-                "reference": "7cfd9e65d11ffb5af41198476395774d4c8a84c5"
+                "reference": "e67f6d32ebd0c749cf9d1dbd9f226c727043cdf2"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/object-enumerator/zipball/7cfd9e65d11ffb5af41198476395774d4c8a84c5",
-                "reference": "7cfd9e65d11ffb5af41198476395774d4c8a84c5",
+                "url": "https://api.github.com/repos/sebastianbergmann/object-enumerator/zipball/e67f6d32ebd0c749cf9d1dbd9f226c727043cdf2",
+                "reference": "e67f6d32ebd0c749cf9d1dbd9f226c727043cdf2",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.0",
+                "php": ">=7.0",
                 "sebastian/object-reflector": "^1.1.1",
                 "sebastian/recursion-context": "^3.0"
             },
@@ -1901,24 +1964,30 @@
             ],
             "description": "Traverses array structures and object graphs to enumerate all referenced objects",
             "homepage": "https://github.com/sebastianbergmann/object-enumerator/",
-            "time": "2017-08-03T12:35:26+00:00"
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2020-11-30T07:40:27+00:00"
         },
         {
             "name": "sebastian/object-reflector",
-            "version": "1.1.1",
+            "version": "1.1.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/object-reflector.git",
-                "reference": "773f97c67f28de00d397be301821b06708fca0be"
+                "reference": "9b8772b9cbd456ab45d4a598d2dd1a1bced6363d"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/object-reflector/zipball/773f97c67f28de00d397be301821b06708fca0be",
-                "reference": "773f97c67f28de00d397be301821b06708fca0be",
+                "url": "https://api.github.com/repos/sebastianbergmann/object-reflector/zipball/9b8772b9cbd456ab45d4a598d2dd1a1bced6363d",
+                "reference": "9b8772b9cbd456ab45d4a598d2dd1a1bced6363d",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.0"
+                "php": ">=7.0"
             },
             "require-dev": {
                 "phpunit/phpunit": "^6.0"
@@ -1946,24 +2015,30 @@
             ],
             "description": "Allows reflection of object attributes, including inherited and non-public ones",
             "homepage": "https://github.com/sebastianbergmann/object-reflector/",
-            "time": "2017-03-29T09:07:27+00:00"
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2020-11-30T07:37:18+00:00"
         },
         {
             "name": "sebastian/recursion-context",
-            "version": "3.0.0",
+            "version": "3.0.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/recursion-context.git",
-                "reference": "5b0cd723502bac3b006cbf3dbf7a1e3fcefe4fa8"
+                "reference": "367dcba38d6e1977be014dc4b22f47a484dac7fb"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/recursion-context/zipball/5b0cd723502bac3b006cbf3dbf7a1e3fcefe4fa8",
-                "reference": "5b0cd723502bac3b006cbf3dbf7a1e3fcefe4fa8",
+                "url": "https://api.github.com/repos/sebastianbergmann/recursion-context/zipball/367dcba38d6e1977be014dc4b22f47a484dac7fb",
+                "reference": "367dcba38d6e1977be014dc4b22f47a484dac7fb",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.0"
+                "php": ">=7.0"
             },
             "require-dev": {
                 "phpunit/phpunit": "^6.0"
@@ -1984,14 +2059,14 @@
                 "BSD-3-Clause"
             ],
             "authors": [
-                {
-                    "name": "Jeff Welch",
-                    "email": "whatthejeff@gmail.com"
-                },
                 {
                     "name": "Sebastian Bergmann",
                     "email": "sebastian@phpunit.de"
                 },
+                {
+                    "name": "Jeff Welch",
+                    "email": "whatthejeff@gmail.com"
+                },
                 {
                     "name": "Adam Harvey",
                     "email": "aharvey@php.net"
@@ -1999,24 +2074,30 @@
             ],
             "description": "Provides functionality to recursively process PHP variables",
             "homepage": "http://www.github.com/sebastianbergmann/recursion-context",
-            "time": "2017-03-03T06:23:57+00:00"
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2020-11-30T07:34:24+00:00"
         },
         {
             "name": "sebastian/resource-operations",
-            "version": "2.0.1",
+            "version": "2.0.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/resource-operations.git",
-                "reference": "4d7a795d35b889bf80a0cc04e08d77cedfa917a9"
+                "reference": "31d35ca87926450c44eae7e2611d45a7a65ea8b3"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/resource-operations/zipball/4d7a795d35b889bf80a0cc04e08d77cedfa917a9",
-                "reference": "4d7a795d35b889bf80a0cc04e08d77cedfa917a9",
+                "url": "https://api.github.com/repos/sebastianbergmann/resource-operations/zipball/31d35ca87926450c44eae7e2611d45a7a65ea8b3",
+                "reference": "31d35ca87926450c44eae7e2611d45a7a65ea8b3",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.1"
+                "php": ">=7.1"
             },
             "type": "library",
             "extra": {
@@ -2041,7 +2122,13 @@
             ],
             "description": "Provides a list of PHP built-in functions that operate on resources",
             "homepage": "https://www.github.com/sebastianbergmann/resource-operations",
-            "time": "2018-10-04T04:07:39+00:00"
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2020-11-30T07:30:19+00:00"
         },
         {
             "name": "sebastian/version",
@@ -2088,23 +2175,23 @@
         },
         {
             "name": "theseer/tokenizer",
-            "version": "1.1.3",
+            "version": "1.2.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/theseer/tokenizer.git",
-                "reference": "11336f6f84e16a720dae9d8e6ed5019efa85a0f9"
+                "reference": "75a63c33a8577608444246075ea0af0d052e452a"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/theseer/tokenizer/zipball/11336f6f84e16a720dae9d8e6ed5019efa85a0f9",
-                "reference": "11336f6f84e16a720dae9d8e6ed5019efa85a0f9",
+                "url": "https://api.github.com/repos/theseer/tokenizer/zipball/75a63c33a8577608444246075ea0af0d052e452a",
+                "reference": "75a63c33a8577608444246075ea0af0d052e452a",
                 "shasum": ""
             },
             "require": {
                 "ext-dom": "*",
                 "ext-tokenizer": "*",
                 "ext-xmlwriter": "*",
-                "php": "^7.0"
+                "php": "^7.2 || ^8.0"
             },
             "type": "library",
             "autoload": {
@@ -2124,34 +2211,45 @@
                 }
             ],
             "description": "A small library for converting tokenized PHP source code into XML and potentially other formats",
-            "time": "2019-06-13T22:48:21+00:00"
+            "funding": [
+                {
+                    "url": "https://github.com/theseer",
+                    "type": "github"
+                }
+            ],
+            "time": "2020-07-12T23:59:07+00:00"
         },
         {
             "name": "webmozart/assert",
-            "version": "1.9.0",
+            "version": "1.10.0",
             "source": {
                 "type": "git",
-                "url": "https://github.com/webmozart/assert.git",
-                "reference": "9dc4f203e36f2b486149058bade43c851dd97451"
+                "url": "https://github.com/webmozarts/assert.git",
+                "reference": "6964c76c7804814a842473e0c8fd15bab0f18e25"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/webmozart/assert/zipball/9dc4f203e36f2b486149058bade43c851dd97451",
-                "reference": "9dc4f203e36f2b486149058bade43c851dd97451",
+                "url": "https://api.github.com/repos/webmozarts/assert/zipball/6964c76c7804814a842473e0c8fd15bab0f18e25",
+                "reference": "6964c76c7804814a842473e0c8fd15bab0f18e25",
                 "shasum": ""
             },
             "require": {
-                "php": "^5.3.3 || ^7.0",
+                "php": "^7.2 || ^8.0",
                 "symfony/polyfill-ctype": "^1.8"
             },
             "conflict": {
                 "phpstan/phpstan": "<0.12.20",
-                "vimeo/psalm": "<3.9.1"
+                "vimeo/psalm": "<4.6.1 || 4.6.2"
             },
             "require-dev": {
-                "phpunit/phpunit": "^4.8.36 || ^7.5.13"
+                "phpunit/phpunit": "^8.5.13"
             },
             "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.10-dev"
+                }
+            },
             "autoload": {
                 "psr-4": {
                     "Webmozart\\Assert\\": "src/"
@@ -2173,7 +2271,7 @@
                 "check",
                 "validate"
             ],
-            "time": "2020-06-16T10:16:42+00:00"
+            "time": "2021-03-09T10:59:23+00:00"
         }
     ],
     "aliases": [],
@@ -2181,7 +2279,9 @@
     "stability-flags": [],
     "prefer-stable": false,
     "prefer-lowest": false,
-    "platform": [],
+    "platform": {
+        "php": ">=7.2"
+    },
     "platform-dev": [],
     "plugin-api-version": "1.1.0"
 }
diff --git a/src/Mjml/Twig/MjmlExtension.php b/src/Mjml/Twig/MjmlExtension.php
index 7863f6e..d08f669 100644
--- a/src/Mjml/Twig/MjmlExtension.php
+++ b/src/Mjml/Twig/MjmlExtension.php
@@ -47,4 +47,4 @@ public function render(string $content): string
     {
         return $this->renderer->render($content);
     }
-}
\ No newline at end of file
+}
diff --git a/tests/Mjml/Twig/MjmlExtensionTest.php b/tests/Mjml/Twig/MjmlExtensionTest.php
index 092e66f..4eba640 100644
--- a/tests/Mjml/Twig/MjmlExtensionTest.php
+++ b/tests/Mjml/Twig/MjmlExtensionTest.php
@@ -1,6 +1,6 @@
 <?php
 
-namespace Tests\Mjml\Twig;
+namespace Qferrer\Tests\Mjml\Twig;
 
 use PHPUnit\Framework\TestCase;
 use Qferrer\Mjml\Renderer\RendererInterface;
@@ -42,4 +42,4 @@ public function testRender()
 
         $this->extension->render($content);
     }
-}
\ No newline at end of file
+}