diff --git a/composer.json b/composer.json
index 4c78849..81883bb 100644
--- a/composer.json
+++ b/composer.json
@@ -18,7 +18,7 @@
     },
     "require": {
         "php": ">=5.6.0",
-        "symfony/symfony": "^2.8.6|^3.0.6"
+        "symfony/symfony": "^3.3|^4.0"
     },
     "require-dev": {
         "phpunit/phpunit": "~5.0",