diff --git a/composer.json b/composer.json
index 4959fca..6fcff7b 100644
--- a/composer.json
+++ b/composer.json
@@ -7,7 +7,7 @@
         "ramsey/uuid": "^3.9"
     },
     "require-dev": {
-        "phpunit/phpunit": "^7.5",
+        "phpunit/phpunit": "^9.6.33",
         "phpstan/phpstan": "^0.12.25",
         "squizlabs/php_codesniffer": "^3.5"
     },