diff --git a/composer.json b/composer.json
index 41d4b62..6dadd3f 100644
--- a/composer.json
+++ b/composer.json
@@ -25,6 +25,6 @@
         "ext-json": "*"
     },
     "require-dev": {
-        "phpunit/phpunit": "^9.5"
+        "phpunit/phpunit": "^10.5.19"
     }
 }