diff --git a/composer.json b/composer.json
index 91db207..4858485 100644
--- a/composer.json
+++ b/composer.json
@@ -20,7 +20,7 @@
     },
     "require-dev": {
         "squizlabs/php_codesniffer": "3.7.1",
-        "phpunit/phpunit": "9.5.14",
+        "phpunit/phpunit": "9.6.18",
         "clivern/phpcs": "1.0.2"
     },
     "autoload": {