diff --git a/composer.json b/composer.json
index 4372938b..900cb85b 100644
--- a/composer.json
+++ b/composer.json
@@ -25,7 +25,7 @@
   },
   "require": {
     "php": "~8.1.0 || ~8.2.0 || ~8.3.0",
-    "phpunit/phpunit": "^10.4.2"
+    "phpunit/phpunit": "^10.4.0"
   },
   "require-dev": {
     "ergebnis/composer-normalize": "^2.39.0",
diff --git a/composer.lock b/composer.lock
index 43e32bb2..23c93891 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "6bd131bdf38d89a3ea8f9b3e6d345274",
+    "content-hash": "e8f51f8982d4e7958624c2f1ba1d83c9",
     "packages": [
         {
             "name": "myclabs/deep-copy",