diff --git a/.env b/.env
index d4848a1..0a5cbad 100644
--- a/.env
+++ b/.env
@@ -1,3 +1,3 @@
-PHP_BASE_IMAGE=php:7.2-cli
+PHP_BASE_IMAGE=php:7.3-cli
 PHP_IMAGE=homepage-php
 NODE_IMAGE=node:12-alpine
diff --git a/.php_cs b/.php_cs
index 3796e84..f0e69a6 100644
--- a/.php_cs
+++ b/.php_cs
@@ -11,11 +11,11 @@ return PhpCsFixer\Config::create()
     ->setFinder($finder)
     ->setRules([
         '@Symfony' => true,
-        '@PHP71Migration' => true,
+        '@PHP73Migration' => true,
         'array_syntax' => ['syntax' => 'short'],
+        'no_useless_return' => true,
         'ordered_imports' => true,
         'phpdoc_order' => true,
-        'no_useless_return' => true,
         'semicolon_after_instruction' => false,
         'yoda_style' => false,
     ])
diff --git a/composer.json b/composer.json
index b07b965..54bc01f 100644
--- a/composer.json
+++ b/composer.json
@@ -12,7 +12,7 @@
     },
     "require-dev": {
         "gajus/dindent": "^2.0",
-        "friendsofphp/php-cs-fixer": "^2.12",
+        "friendsofphp/php-cs-fixer": "^2.15",
         "sculpin/sculpin": "^3.0"
     },
     "autoload": {
diff --git a/composer.lock b/composer.lock
index 0cd470b..b967eac 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "b63732988d00fd669ea934d62402fd48",
+    "content-hash": "c6dbaa9f2424b9e4e8e3e4fd3d854e0d",
     "packages": [],
     "packages-dev": [
         {
@@ -677,16 +677,16 @@
         },
         {
             "name": "friendsofphp/php-cs-fixer",
-            "version": "v2.14.2",
+            "version": "v2.15.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/FriendsOfPHP/PHP-CS-Fixer.git",
-                "reference": "ff401e58261ffc5934a58f795b3f95b355e276cb"
+                "reference": "adfab51ae979ee8b0fcbc55aa231ec2786cb1f91"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/FriendsOfPHP/PHP-CS-Fixer/zipball/ff401e58261ffc5934a58f795b3f95b355e276cb",
-                "reference": "ff401e58261ffc5934a58f795b3f95b355e276cb",
+                "url": "https://api.github.com/repos/FriendsOfPHP/PHP-CS-Fixer/zipball/adfab51ae979ee8b0fcbc55aa231ec2786cb1f91",
+                "reference": "adfab51ae979ee8b0fcbc55aa231ec2786cb1f91",
                 "shasum": ""
             },
             "require": {
@@ -714,10 +714,10 @@
                 "mikey179/vfsstream": "^1.6",
                 "php-coveralls/php-coveralls": "^2.1",
                 "php-cs-fixer/accessible-object": "^1.0",
-                "php-cs-fixer/phpunit-constraint-isidenticalstring": "^1.0.1",
-                "php-cs-fixer/phpunit-constraint-xmlmatchesxsd": "^1.0.1",
+                "php-cs-fixer/phpunit-constraint-isidenticalstring": "^1.1",
+                "php-cs-fixer/phpunit-constraint-xmlmatchesxsd": "^1.1",
                 "phpunit/phpunit": "^5.7.27 || ^6.5.8 || ^7.1",
-                "phpunitgoodpractices/traits": "^1.5.1",
+                "phpunitgoodpractices/traits": "^1.8",
                 "symfony/phpunit-bridge": "^4.0"
             },
             "suggest": {
@@ -730,6 +730,11 @@
                 "php-cs-fixer"
             ],
             "type": "application",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.15-dev"
+                }
+            },
             "autoload": {
                 "psr-4": {
                     "PhpCsFixer\\": "src/"
@@ -761,7 +766,7 @@
                 }
             ],
             "description": "A tool to automatically fix PHP code style",
-            "time": "2019-02-17T17:44:13+00:00"
+            "time": "2019-05-06T07:13:51+00:00"
         },
         {
             "name": "gajus/dindent",