diff --git a/composer.json b/composer.json
index 2eb8e71..f7d462a 100644
--- a/composer.json
+++ b/composer.json
@@ -25,13 +25,13 @@
     "require": {
         "php": ">=5.3",
         "ext-gd": "*",
-        "symfony/console": "~2.0|~3.0",
-        "coduo/phpspec-data-provider-extension": "^1.0"
+        "symfony/console": "~2.0|~3.0|~4.0"
     },
     "require-dev": {
         "phpspec/phpspec": "2.*",
         "behat/behat": "3.*",
-        "friendsofphp/php-cs-fixer": "@stable"
+        "friendsofphp/php-cs-fixer": "@stable",
+        "coduo/phpspec-data-provider-extension": "^1.0"
     },
     "config": {
         "bin-dir": "bin"