diff --git a/composer.json b/composer.json
index 2623d27..710471c 100644
--- a/composer.json
+++ b/composer.json
@@ -24,19 +24,18 @@
         }
     ],
     "require": {
-        "php" : "^8.1",
-        "ext-json": "*"
+        "php" : "^8.1"
     },
     "require-dev": {
-        "friendsofphp/php-cs-fixer": "^3.52.1",
+        "friendsofphp/php-cs-fixer": "^3.53.0",
         "httpwg/structured-field-tests": "*@dev",
-        "phpstan/phpstan": "^1.10.64",
-        "phpstan/phpstan-strict-rules": "^1.5.2",
+        "phpstan/phpstan": "^1.10.66",
+        "phpstan/phpstan-strict-rules": "^1.5.3",
         "phpstan/phpstan-phpunit": "^1.3.16",
         "phpstan/phpstan-deprecation-rules": "^1.1.4",
-        "phpunit/phpunit": "^10.5.15",
+        "phpunit/phpunit": "^10.5.15 || ^11.1.1",
         "phpbench/phpbench": "^1.2.15",
-        "symfony/var-dumper": "^6.4.4",
+        "symfony/var-dumper": "^6.4.6",
         "bakame/aide-base32": "dev-main"
     },
     "autoload": {