diff --git a/composer.lock b/composer.lock
index 1d7b126..167dcbc 100644
--- a/composer.lock
+++ b/composer.lock
@@ -1,30 +1,30 @@
 {
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-        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
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@@ -49,79 +49,28 @@
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@@ -213,6 +163,9 @@
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@@ -851,30 +939,31 @@
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@@ -884,6 +973,9 @@
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+            "description": "A generic function and convention to trigger deprecation notices",
+            "homepage": "https://symfony.com",
+            "time": "2020-06-06T08:49:21+00:00"
+        },
+        {
+            "name": "symfony/event-dispatcher",
+            "version": "v5.1.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/event-dispatcher.git",
+                "reference": "cc0d059e2e997e79ca34125a52f3e33de4424ac7"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/event-dispatcher/zipball/cc0d059e2e997e79ca34125a52f3e33de4424ac7",
+                "reference": "cc0d059e2e997e79ca34125a52f3e33de4424ac7",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.2.5",
+                "symfony/deprecation-contracts": "^2.1",
+                "symfony/event-dispatcher-contracts": "^2",
+                "symfony/polyfill-php80": "^1.15"
             },
             "conflict": {
-                "symfony/dependency-injection": "<3.4"
+                "symfony/dependency-injection": "<4.4"
+            },
+            "provide": {
+                "psr/event-dispatcher-implementation": "1.0",
+                "symfony/event-dispatcher-implementation": "2.0"
             },
             "require-dev": {
                 "psr/log": "~1.0",
-                "symfony/config": "~3.4|~4.0",
-                "symfony/dependency-injection": "~3.4|~4.0",
-                "symfony/expression-language": "~3.4|~4.0",
-                "symfony/stopwatch": "~3.4|~4.0"
+                "symfony/config": "^4.4|^5.0",
+                "symfony/dependency-injection": "^4.4|^5.0",
+                "symfony/expression-language": "^4.4|^5.0",
+                "symfony/http-foundation": "^4.4|^5.0",
+                "symfony/service-contracts": "^1.1|^2",
+                "symfony/stopwatch": "^4.4|^5.0"
             },
             "suggest": {
                 "symfony/dependency-injection": "",
@@ -938,7 +1184,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "4.0-dev"
+                    "dev-master": "5.1-dev"
                 }
             },
             "autoload": {
@@ -965,29 +1211,92 @@
             ],
             "description": "Symfony EventDispatcher Component",
             "homepage": "https://symfony.com",
-            "time": "2018-01-03T07:38:00+00:00"
+            "time": "2020-05-20T17:43:50+00:00"
         },
         {
-            "name": "symfony/filesystem",
-            "version": "v4.0.3",
+            "name": "symfony/event-dispatcher-contracts",
+            "version": "v2.1.3",
             "source": {
                 "type": "git",
-                "url": "https://github.com/symfony/filesystem.git",
-                "reference": "760e47a4ee64b4c48f4b30017011e09d4c0f05ed"
+                "url": "https://github.com/symfony/event-dispatcher-contracts.git",
+                "reference": "f6f613d74cfc5a623fc36294d3451eb7fa5a042b"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/filesystem/zipball/760e47a4ee64b4c48f4b30017011e09d4c0f05ed",
-                "reference": "760e47a4ee64b4c48f4b30017011e09d4c0f05ed",
+                "url": "https://api.github.com/repos/symfony/event-dispatcher-contracts/zipball/f6f613d74cfc5a623fc36294d3451eb7fa5a042b",
+                "reference": "f6f613d74cfc5a623fc36294d3451eb7fa5a042b",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.1.3"
+                "php": ">=7.2.5",
+                "psr/event-dispatcher": "^1"
+            },
+            "suggest": {
+                "symfony/event-dispatcher-implementation": ""
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "4.0-dev"
+                    "dev-master": "2.1-dev"
+                },
+                "thanks": {
+                    "name": "symfony/contracts",
+                    "url": "https://github.com/symfony/contracts"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Contracts\\EventDispatcher\\": ""
+                }
+            },
+            "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": "Generic abstractions related to dispatching event",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "abstractions",
+                "contracts",
+                "decoupling",
+                "interfaces",
+                "interoperability",
+                "standards"
+            ],
+            "time": "2020-07-06T13:23:11+00:00"
+        },
+        {
+            "name": "symfony/filesystem",
+            "version": "v5.1.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/filesystem.git",
+                "reference": "6e4320f06d5f2cce0d96530162491f4465179157"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/filesystem/zipball/6e4320f06d5f2cce0d96530162491f4465179157",
+                "reference": "6e4320f06d5f2cce0d96530162491f4465179157",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.2.5",
+                "symfony/polyfill-ctype": "~1.8"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "5.1-dev"
                 }
             },
             "autoload": {
@@ -1014,29 +1323,29 @@
             ],
             "description": "Symfony Filesystem Component",
             "homepage": "https://symfony.com",
-            "time": "2018-01-03T07:38:00+00:00"
+            "time": "2020-05-30T20:35:19+00:00"
         },
         {
             "name": "symfony/finder",
-            "version": "v4.0.3",
+            "version": "v5.1.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/finder.git",
-                "reference": "8b08180f2b7ccb41062366b9ad91fbc4f1af8601"
+                "reference": "4298870062bfc667cb78d2b379be4bf5dec5f187"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/finder/zipball/8b08180f2b7ccb41062366b9ad91fbc4f1af8601",
-                "reference": "8b08180f2b7ccb41062366b9ad91fbc4f1af8601",
+                "url": "https://api.github.com/repos/symfony/finder/zipball/4298870062bfc667cb78d2b379be4bf5dec5f187",
+                "reference": "4298870062bfc667cb78d2b379be4bf5dec5f187",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.1.3"
+                "php": ">=7.2.5"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "4.0-dev"
+                    "dev-master": "5.1-dev"
                 }
             },
             "autoload": {
@@ -1063,29 +1372,31 @@
             ],
             "description": "Symfony Finder Component",
             "homepage": "https://symfony.com",
-            "time": "2018-01-03T07:38:00+00:00"
+            "time": "2020-05-20T17:43:50+00:00"
         },
         {
             "name": "symfony/options-resolver",
-            "version": "v4.0.3",
+            "version": "v5.1.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/options-resolver.git",
-                "reference": "30d9240b30696a69e893534c9fc4a5c72ab6689b"
+                "reference": "663f5dd5e14057d1954fe721f9709d35837f2447"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/options-resolver/zipball/30d9240b30696a69e893534c9fc4a5c72ab6689b",
-                "reference": "30d9240b30696a69e893534c9fc4a5c72ab6689b",
+                "url": "https://api.github.com/repos/symfony/options-resolver/zipball/663f5dd5e14057d1954fe721f9709d35837f2447",
+                "reference": "663f5dd5e14057d1954fe721f9709d35837f2447",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.1.3"
+                "php": ">=7.2.5",
+                "symfony/deprecation-contracts": "^2.1",
+                "symfony/polyfill-php80": "^1.15"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "4.0-dev"
+                    "dev-master": "5.1-dev"
                 }
             },
             "autoload": {
@@ -1117,30 +1428,34 @@
                 "configuration",
                 "options"
             ],
-            "time": "2018-01-03T07:38:00+00:00"
+            "time": "2020-05-23T13:08:13+00:00"
         },
         {
             "name": "symfony/polyfill-php70",
-            "version": "v1.6.0",
+            "version": "v1.18.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-php70.git",
-                "reference": "0442b9c0596610bd24ae7b5f0a6cdbbc16d9fcff"
+                "reference": "0dd93f2c578bdc9c72697eaa5f1dd25644e618d3"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-php70/zipball/0442b9c0596610bd24ae7b5f0a6cdbbc16d9fcff",
-                "reference": "0442b9c0596610bd24ae7b5f0a6cdbbc16d9fcff",
+                "url": "https://api.github.com/repos/symfony/polyfill-php70/zipball/0dd93f2c578bdc9c72697eaa5f1dd25644e618d3",
+                "reference": "0dd93f2c578bdc9c72697eaa5f1dd25644e618d3",
                 "shasum": ""
             },
             "require": {
-                "paragonie/random_compat": "~1.0|~2.0",
+                "paragonie/random_compat": "~1.0|~2.0|~9.99",
                 "php": ">=5.3.3"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.6-dev"
+                    "dev-master": "1.18-dev"
+                },
+                "thanks": {
+                    "name": "symfony/polyfill",
+                    "url": "https://github.com/symfony/polyfill"
                 }
             },
             "autoload": {
@@ -1176,20 +1491,20 @@
                 "portable",
                 "shim"
             ],
-            "time": "2017-10-11T12:05:26+00:00"
+            "time": "2020-07-14T12:35:20+00:00"
         },
         {
             "name": "symfony/polyfill-php72",
-            "version": "v1.6.0",
+            "version": "v1.18.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-php72.git",
-                "reference": "6de4f4884b97abbbed9f0a84a95ff2ff77254254"
+                "reference": "639447d008615574653fb3bc60d1986d7172eaae"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-php72/zipball/6de4f4884b97abbbed9f0a84a95ff2ff77254254",
-                "reference": "6de4f4884b97abbbed9f0a84a95ff2ff77254254",
+                "url": "https://api.github.com/repos/symfony/polyfill-php72/zipball/639447d008615574653fb3bc60d1986d7172eaae",
+                "reference": "639447d008615574653fb3bc60d1986d7172eaae",
                 "shasum": ""
             },
             "require": {
@@ -1198,7 +1513,11 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.6-dev"
+                    "dev-master": "1.18-dev"
+                },
+                "thanks": {
+                    "name": "symfony/polyfill",
+                    "url": "https://github.com/symfony/polyfill"
                 }
             },
             "autoload": {
@@ -1231,29 +1550,30 @@
                 "portable",
                 "shim"
             ],
-            "time": "2017-10-11T12:05:26+00:00"
+            "time": "2020-07-14T12:35:20+00:00"
         },
         {
             "name": "symfony/process",
-            "version": "v4.0.3",
+            "version": "v5.1.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/process.git",
-                "reference": "2145b3e8137e463b1051b79440a59b38220944f0"
+                "reference": "7f6378c1fa2147eeb1b4c385856ce9de0d46ebd1"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/process/zipball/2145b3e8137e463b1051b79440a59b38220944f0",
-                "reference": "2145b3e8137e463b1051b79440a59b38220944f0",
+                "url": "https://api.github.com/repos/symfony/process/zipball/7f6378c1fa2147eeb1b4c385856ce9de0d46ebd1",
+                "reference": "7f6378c1fa2147eeb1b4c385856ce9de0d46ebd1",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.1.3"
+                "php": ">=7.2.5",
+                "symfony/polyfill-php80": "^1.15"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "4.0-dev"
+                    "dev-master": "5.1-dev"
                 }
             },
             "autoload": {
@@ -1280,29 +1600,92 @@
             ],
             "description": "Symfony Process Component",
             "homepage": "https://symfony.com",
-            "time": "2018-01-03T07:38:00+00:00"
+            "time": "2020-05-30T20:35:19+00:00"
         },
         {
-            "name": "symfony/stopwatch",
-            "version": "v4.0.3",
+            "name": "symfony/service-contracts",
+            "version": "v2.1.3",
             "source": {
                 "type": "git",
-                "url": "https://github.com/symfony/stopwatch.git",
-                "reference": "d52321f0e2b596bd03b5d1dd6eebe71caa925704"
+                "url": "https://github.com/symfony/service-contracts.git",
+                "reference": "58c7475e5457c5492c26cc740cc0ad7464be9442"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/stopwatch/zipball/d52321f0e2b596bd03b5d1dd6eebe71caa925704",
-                "reference": "d52321f0e2b596bd03b5d1dd6eebe71caa925704",
+                "url": "https://api.github.com/repos/symfony/service-contracts/zipball/58c7475e5457c5492c26cc740cc0ad7464be9442",
+                "reference": "58c7475e5457c5492c26cc740cc0ad7464be9442",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.1.3"
+                "php": ">=7.2.5",
+                "psr/container": "^1.0"
+            },
+            "suggest": {
+                "symfony/service-implementation": ""
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "4.0-dev"
+                    "dev-master": "2.1-dev"
+                },
+                "thanks": {
+                    "name": "symfony/contracts",
+                    "url": "https://github.com/symfony/contracts"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Contracts\\Service\\": ""
+                }
+            },
+            "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": "Generic abstractions related to writing services",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "abstractions",
+                "contracts",
+                "decoupling",
+                "interfaces",
+                "interoperability",
+                "standards"
+            ],
+            "time": "2020-07-06T13:23:11+00:00"
+        },
+        {
+            "name": "symfony/stopwatch",
+            "version": "v5.1.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/stopwatch.git",
+                "reference": "0f7c58cf81dbb5dd67d423a89d577524a2ec0323"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/stopwatch/zipball/0f7c58cf81dbb5dd67d423a89d577524a2ec0323",
+                "reference": "0f7c58cf81dbb5dd67d423a89d577524a2ec0323",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.2.5",
+                "symfony/service-contracts": "^1.0|^2"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "5.1-dev"
                 }
             },
             "autoload": {
@@ -1329,13 +1712,13 @@
             ],
             "description": "Symfony Stopwatch Component",
             "homepage": "https://symfony.com",
-            "time": "2018-01-03T07:38:00+00:00"
+            "time": "2020-05-20T17:43:50+00:00"
         }
     ],
     "aliases": [],
     "minimum-stability": "stable",
     "stability-flags": [],
-    "prefer-stable": false,
+    "prefer-stable": true,
     "prefer-lowest": false,
     "platform": {
         "php": "^7"
diff --git a/spec/fixtures/read-configuration/invalid.json b/spec/fixtures/read-configuration/invalid.json
deleted file mode 100644
index f3a9538..0000000
--- a/spec/fixtures/read-configuration/invalid.json
+++ /dev/null
@@ -1,8 +0,0 @@
-{
-    "version": 2,
-    "services": {
-        "foo": {
-            "image": "bar"
-        }
-    }
-}
diff --git a/spec/fixtures/read-configuration/invalid.yml b/spec/fixtures/read-configuration/invalid.yml
new file mode 100644
index 0000000..2873f33
--- /dev/null
+++ b/spec/fixtures/read-configuration/invalid.yml
@@ -0,0 +1,4 @@
+version
+services:
+    foo:
+        image: bar
diff --git a/spec/read-configuratoin.php b/spec/read-configuratoin.php
index 45d7f7c..2262345 100644
--- a/spec/read-configuratoin.php
+++ b/spec/read-configuratoin.php
@@ -19,7 +19,7 @@ describe('Reading configuration', function () {
 
     it('should report if YAML is invalid', function () {
         expect(function () {
-            readConfiguration(__DIR__.'/fixtures/read-configuration/invalid.json');
+            readConfiguration(__DIR__.'/fixtures/read-configuration/invalid.yml');
         })
             ->toThrow(new InvalidArgumentException());
     });
diff --git a/src/functions.php b/src/functions.php
index 0202173..946c0df 100644
--- a/src/functions.php
+++ b/src/functions.php
@@ -5,6 +5,7 @@ namespace PMSIpilot\DockerComposeViz;
 use Fhaculty\Graph\Edge;
 use Fhaculty\Graph\Graph;
 use Fhaculty\Graph\Vertex;
+use InvalidArgumentException;
 use Symfony\Component\Console\Output\OutputInterface;
 use Symfony\Component\Yaml\Exception\ParseException;
 use Symfony\Component\Yaml\Yaml;
@@ -15,10 +16,6 @@ const WITHOUT_PORTS = 4;
 
 /**
  * @internal
- *
- * @param OutputInterface $output
- *
- * @return callable
  */
 function logger(OutputInterface $output): callable
 {
@@ -31,19 +28,17 @@ function logger(OutputInterface $output): callable
  * @public
  *
  * @param string $path Path to a YAML file
- *
- * @return array
  */
 function readConfiguration(string $path): array
 {
     if (false === file_exists($path)) {
-        throw new \InvalidArgumentException(sprintf('File "%s" does not exist', $path));
+        throw new InvalidArgumentException(sprintf('File "%s" does not exist', $path));
     }
 
     try {
         return Yaml::parse(file_get_contents($path));
     } catch (ParseException $exception) {
-        throw new \InvalidArgumentException(sprintf('File "%s" does not contain valid YAML', $path));
+        throw new InvalidArgumentException(sprintf('File "%s" does not contain valid YAML', $path), $exception->getCode(), $exception);
     }
 }
 
@@ -461,8 +456,6 @@ function addNetwork(Graph $graph, string $name, string $type = null)
  * @param string|null $alias         Alias associated to the linked element
  * @param bool|null   $bidirectional Biderectional or not
  * @param bool|null   $condition     Wether the alias represents a condition or not
- *
- * @return Edge\Directed
  */
 function addRelation(Vertex $from, Vertex $to, string $type, string $alias = null, bool $bidirectional = false, bool $condition = false): Edge\Directed
 {