diff --git a/composer.json b/composer.json
index 9969a42c0..4c9b3f24c 100644
--- a/composer.json
+++ b/composer.json
@@ -26,6 +26,7 @@
     "require": {
         "php": "^7.1",
         "symfony/framework-bundle": "^3.4|^4.1",
+        "symfony/config": "^3.4|^4.1",
         "symfony/console": "^3.4|^4.1",
         "symfony/dependency-injection": "^3.4|^4.1",
         "doctrine/dbal": "^2.5.12",