diff --git a/composer.json b/composer.json
index bcba469..523765b 100644
--- a/composer.json
+++ b/composer.json
@@ -45,7 +45,7 @@
   "require-dev": {
     "pds/skeleton": "^1.0",
     "roave/security-advisories": "dev-master",
-    "symfony/var-dumper": "^3.3",
+    "symfony/var-dumper": "^4.3",
     "phpunit/phpunit": "^6.1"
   }
 }