diff --git a/composer.json b/composer.json
index 3c27d59..312671d 100644
--- a/composer.json
+++ b/composer.json
@@ -39,7 +39,7 @@
   "license": "GPL-2.0+",
   "minimum-stability": "dev",
   "require": {
-    "symfony/var-dumper": "~2.7|^3"
+    "symfony/var-dumper": "~2.7|^3|^4"
   },
   "suggest": {},
   "extra": {