diff --git a/composer.json b/composer.json
index fe105cc..2fe3fbe 100644
--- a/composer.json
+++ b/composer.json
@@ -10,7 +10,7 @@
     ],
     "require": {
         "php": ">=5.3.2",
-        "symfony/event-dispatcher": "^2.3 || ^3.0"
+        "symfony/event-dispatcher": "^2.3 || ^3.0 || ^4.0"
     },
     "autoload": {
         "psr-0": { "Jmikola": "src/" }