diff --git a/composer.json b/composer.json
index 1036b4a137d..a2ec7cea680 100644
--- a/composer.json
+++ b/composer.json
@@ -20,10 +20,10 @@
         "doctrine/instantiator": "^1.0.1",
         "doctrine/common": ">=2.5-dev,<2.9-dev",
         "doctrine/cache": "~1.4",
-        "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": "~4.0"
     },
     "suggest": {