diff --git a/composer.json b/composer.json
index 52fe80d6..11ce195c 100644
--- a/composer.json
+++ b/composer.json
@@ -20,7 +20,7 @@
         "fakerphp/faker": "^1.9.1",
         "mockery/mockery": "^1.3.1",
         "nunomaduro/collision": "^4.1",
-        "phpunit/phpunit": "^8.5"
+        "phpunit/phpunit": "^8.5|^9.3"
     },
     "config": {
         "optimize-autoloader": true,