diff --git a/composer.json b/composer.json
index cdbeea99..261bbf4d 100644
--- a/composer.json
+++ b/composer.json
@@ -12,7 +12,7 @@
 	"require": {
 		"php": "~7.1",
 		"phpstan/phpstan": "^0.10",
-		"phpunit/phpunit": "^6.3"
+		"phpunit/phpunit": "^7.0 || ^6.3"
 	},
 	"require-dev": {
 		"consistence/coding-standard": "^2.0",