diff --git a/composer.json b/composer.json
index aa860a4..310e326 100644
--- a/composer.json
+++ b/composer.json
@@ -20,7 +20,7 @@
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^2.11",
         "phpunit/phpunit": "^5.7",
-        "symfony/var-dumper": "^3.4"
+        "symfony/var-dumper": "^3.4 || ^4.0"
     },
     "autoload": {
         "files": ["src/Helpers.php"],