diff --git a/composer.json b/composer.json
index 677f7f2..23ab69c 100644
--- a/composer.json
+++ b/composer.json
@@ -28,7 +28,7 @@
     "require-dev": {
         "mockery/mockery": "^1.4",
         "orchestra/testbench": "^4.0|^5.0|^6.0",
-        "phpunit/phpunit": "^8.0",
+        "phpunit/phpunit": "^9.3.3",
         "squizlabs/php_codesniffer": "^3.6"
     },
     "autoload": {