diff --git a/composer.json b/composer.json
index 780105f3b..5c89e8f97 100644
--- a/composer.json
+++ b/composer.json
@@ -22,10 +22,10 @@
         "doctrine/common": "^2.7.1",
         "doctrine/cache": "~1.5",
         "doctrine/annotations": "~1.2",
-        "symfony/console": "~2.5|~3.0"
+        "symfony/console": "~2.5|~3.0|~4.0"
     },
     "require-dev": {
-        "symfony/yaml": "~2.3|~3.0",
+        "symfony/yaml": "~2.3|~3.0|~4.0",
         "phpunit/phpunit": "^6.0"
     },
     "suggest": {