diff --git a/composer.json b/composer.json
index af8d40c9..ec46c59c 100644
--- a/composer.json
+++ b/composer.json
@@ -18,7 +18,7 @@
         "fakerphp/faker": "^1.9.1",
         "mockery/mockery": "^1.0",
         "nunomaduro/collision": "^3.0",
-        "phpunit/phpunit": "^8.0"
+        "phpunit/phpunit": "^8.0|^9.3"
     },
     "config": {
         "optimize-autoloader": true,