diff --git a/composer.json b/composer.json
index 615a0c1..8d40d68 100644
--- a/composer.json
+++ b/composer.json
@@ -22,7 +22,7 @@
   "require-dev" : {
     "nunomaduro/collision": "^3.0",
     "orchestra/testbench": "^4.4",
-    "phpunit/phpunit": "^8.2",
+    "phpunit/phpunit": "^9.5",
     "symfony/var-dumper": "^4.3"
   },
   "autoload" : {