diff --git a/composer.json b/composer.json
index 764e3b6..72a5cda 100644
--- a/composer.json
+++ b/composer.json
@@ -25,7 +25,7 @@
     "require-dev": {
         "phpspec/prophecy": "^1.17",
         "phpspec/prophecy-phpunit": "^2.0",
-        "phpunit/phpunit": "^9.5",
+        "phpunit/phpunit": "^9.6",
         "squizlabs/php_codesniffer": "^3.7"
     },
     "autoload": {