diff --git a/composer.json b/composer.json
index 7c51671..52529dd 100644
--- a/composer.json
+++ b/composer.json
@@ -13,7 +13,7 @@
     "php": ">=7.1"
   },
   "require-dev": {
-    "phpunit/phpunit": "^6.4",
+    "phpunit/phpunit": "^6.4 || ^7.0",
     "larapack/dd": "^1.1",
     "spatie/array-to-xml": "^2.7"
   },