diff --git a/composer.json b/composer.json
index ec0d0af..550433b 100644
--- a/composer.json
+++ b/composer.json
@@ -2,7 +2,7 @@
     "name": "wanfeiyy/dd",
     "description": "use laravel dd replace var_dump",
     "require": {
-        "symfony/var-dumper": "^3.2"
+        "symfony/var-dumper": "~3.4|^4.0"
     },
     "license": "MIT",
     "authors": [