diff --git a/composer.json b/composer.json
index c944dbd8..80087d9f 100644
--- a/composer.json
+++ b/composer.json
@@ -13,7 +13,7 @@
     "php": "^7.1",
     "nikic/php-parser": "4.2.*",
     "symfony/dependency-injection": "4.2.*",
-    "symfony/event-dispatcher": "4.3.*",
+    "symfony/event-dispatcher": "4.2.*",
     "symfony/finder": "4.2.*",
     "symfony/yaml": "4.2.*"
   },