diff --git a/composer.json b/composer.json
index a6d439b..a807f24 100644
--- a/composer.json
+++ b/composer.json
@@ -20,7 +20,7 @@
     "require-dev": {
         "psr/log": "~1.0",
         "gpslab/compressor": "~1.0",
-        "symfony/console": "~2.4|~3.0",
+        "symfony/console": "~2.4|~3.0|~4.0",
         "phpunit/phpunit": "~4.8",
         "scrutinizer/ocular": "~1.5",
         "satooshi/php-coveralls": "^2.0"