diff --git a/composer.json b/composer.json
index 6bfc08b..196fb37 100644
--- a/composer.json
+++ b/composer.json
@@ -10,7 +10,7 @@
     ],
     "require": {
         "php": ">=5.3.2",
-        "symfony/console": "~2.3 || ~3.0"
+        "symfony/console": "~2.3 || ~3.0 || ~4.0"
     },
     "require-dev": {
         "phpunit/phpunit": "~4.8.36 || ~5.7 || ~6.4"