diff --git a/composer.json b/composer.json
index 7edbb44..26125b2 100644
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,6 @@
     ],
     "require": {
         "php": ">= 8.1",
-        "ext-json": "*",
         "ecphp/cas-bundle": "^3",
         "ecphp/ecas": "^4",
         "symfony/framework-bundle": "^6.4 || ^7"