diff --git a/composer.json b/composer.json
index f2891e4..7398d28 100644
--- a/composer.json
+++ b/composer.json
@@ -16,7 +16,7 @@
         "php": ">=7.1.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^4.8|^5.5|^6.5|^9.4"
+        "phpunit/phpunit": "^4.8|^5.5|^6.5|^7.5|^8.5|^9.4"
     },
     "autoload": {
         "psr-4": {