diff --git a/composer.json b/composer.json
index ba34165ff7..3e3f3f7f41 100644
--- a/composer.json
+++ b/composer.json
@@ -10,16 +10,19 @@
     "support": {
         "issues": "https://github.com/EC-CUBE/ec-cube/issues"
     },
-    "minimum-stability": "RC",
     "prefer-stable": true,
     "require": {
         "php": "^8.2",
         "ext-curl": "*",
+        "ext-filter": "*",
         "ext-intl": "*",
         "ext-json": "*",
         "ext-mbstring": "*",
         "ext-openssl": "*",
+        "ext-tokenizer": "*",
+        "ext-xml": "*",
         "ext-zip": "*",
+        "ext-zlib": "*",
         "composer/ca-bundle": "^1.1",
         "composer/composer": "^2.9",
         "doctrine/collections": "^2.1",
@@ -37,13 +40,16 @@
         "ec-cube/plugin-installer": "^2.0",
         "egulias/email-validator": "^4.0",
         "exercise/htmlpurifier-bundle": "^5.0",
+        "ezyang/htmlpurifier": "^4.14",
         "friendsofphp/php-cs-fixer": "^3.75",
         "guzzlehttp/guzzle": "^7.4.5",
+        "justinrainbow/json-schema": "^6.5",
         "knplabs/knp-paginator-bundle": "^6.8",
         "mobiledetect/mobiledetectlib": "^2.8",
         "monolog/monolog": "^3.0",
         "nanasess/bcmath-polyfill": "^1.0",
         "nesbot/carbon": "^3",
+        "phpseclib/phpseclib": "^3.0",
         "psr/cache": "^3.0",
         "psr/container": "^2.0",
         "psr/http-message": "^1.0 || ^2.0",
@@ -51,7 +57,6 @@
         "psr/simple-cache": "^3.0",
         "robthree/twofactorauth": "^3.0",
         "setasign/fpdi": "^2.2",
-        "skorp/detect-incompatible-samesite-useragents": "^1.0",
         "softcreatr/jsonpath": "^0.8",
         "symfony/asset": "^7.4",
         "symfony/cache": "^7.4",
@@ -167,19 +172,13 @@
         ]
     },
     "conflict": {
-        "symfony/symfony": "*",
-        "easycorp/easy-log-handler": "1.0.4|1.0.5"
+        "symfony/symfony": "*"
     },
     "extra": {
         "symfony": {
             "id": "01C0Q71D54BCVSB8ZWR3VECDRD",
             "allow-contrib": false
-        },
-        "symfony-web-dir": ".",
-        "bin-dir": "bin",
-        "src-dir": "src/Eccube",
-        "config-dir": "app/config/eccube",
-        "public-dir": "."
+        }
     },
     "config": {
         "platform": {
@@ -193,7 +192,6 @@
         "sort-packages": true,
         "allow-plugins": {
             "composer/*": true,
-            "kylekatarnls/update-helper": true,
             "ec-cube/plugin-installer": true,
             "phpstan/extension-installer": true,
             "symfony/flex": true
diff --git a/composer.lock b/composer.lock
index 515acc5ff0..7935561a6c 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": "b609f33937ec3f4694c1dc84c1f135f3",
+    "content-hash": "24ff6ea2484f4f8eef6753e72d0f6220",
     "packages": [
         {
             "name": "carbonphp/carbon-doctrine-types",
@@ -5339,54 +5339,6 @@
             ],
             "time": "2026-05-13T10:16:22+00:00"
         },
-        {
-            "name": "skorp/detect-incompatible-samesite-useragents",
-            "version": "1.0.1",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/skorp/detect-incompatible-samesite-useragents.git",
-                "reference": "e3277efe3c12ac618af4536ba1bdb55c33c1ef80"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/skorp/detect-incompatible-samesite-useragents/zipball/e3277efe3c12ac618af4536ba1bdb55c33c1ef80",
-                "reference": "e3277efe3c12ac618af4536ba1bdb55c33c1ef80",
-                "shasum": ""
-            },
-            "require": {
-                "php": "^7.0 || ^8.0"
-            },
-            "require-dev": {
-                "phpunit/phpunit": "^8.0"
-            },
-            "type": "library",
-            "autoload": {
-                "psr-4": {
-                    "Skorp\\Dissua\\": "src"
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Kadir Özdemir"
-                }
-            ],
-            "description": "Determine if UserAgent is incompatible with SameSite=None",
-            "keywords": [
-                "cookies",
-                "safari",
-                "samesite",
-                "samesite cookie"
-            ],
-            "support": {
-                "issues": "https://github.com/skorp/detect-incompatible-samesite-useragents/issues",
-                "source": "https://github.com/skorp/detect-incompatible-samesite-useragents/tree/1.0.1"
-            },
-            "time": "2021-06-25T07:29:16+00:00"
-        },
         {
             "name": "softcreatr/jsonpath",
             "version": "0.8.3",
@@ -15290,18 +15242,22 @@
         }
     ],
     "aliases": [],
-    "minimum-stability": "RC",
+    "minimum-stability": "stable",
     "stability-flags": {},
     "prefer-stable": true,
     "prefer-lowest": false,
     "platform": {
         "php": "^8.2",
         "ext-curl": "*",
+        "ext-filter": "*",
         "ext-intl": "*",
         "ext-json": "*",
         "ext-mbstring": "*",
         "ext-openssl": "*",
-        "ext-zip": "*"
+        "ext-tokenizer": "*",
+        "ext-xml": "*",
+        "ext-zip": "*",
+        "ext-zlib": "*"
     },
     "platform-dev": {},
     "platform-overrides": {
diff --git a/symfony.lock b/symfony.lock
index 0280880177..d203d3c456 100644
--- a/symfony.lock
+++ b/symfony.lock
@@ -26,9 +26,6 @@
     "codeception/module-webdriver": {
         "version": "1.2.0"
     },
-    "codeception/phpunit-wrapper": {
-        "version": "6.0.9"
-    },
     "codeception/stub": {
         "version": "1.0.2"
     },
@@ -65,9 +62,6 @@
             "app/config/eccube/packages/test/dama_doctrine_test_bundle.yaml"
         ]
     },
-    "doctrine/cache": {
-        "version": "v1.7.1"
-    },
     "doctrine/collections": {
         "version": "v1.5.0"
     },
@@ -132,15 +126,6 @@
     "doctrine/sql-formatter": {
         "version": "1.1.1"
     },
-    "easycorp/easy-log-handler": {
-        "version": "1.0",
-        "recipe": {
-            "repo": "github.com/symfony/recipes",
-            "branch": "master",
-            "version": "1.0",
-            "ref": "70062abc2cd58794d2a90274502f81b55cd9951b"
-        }
-    },
     "ec-cube/plugin-installer": {
         "version": "0.0.3"
     },
@@ -213,24 +198,9 @@
     "phar-io/version": {
         "version": "1.0.1"
     },
-    "php-cs-fixer/diff": {
-        "version": "v1.2.0"
-    },
     "php-webdriver/webdriver": {
         "version": "1.10.0"
     },
-    "phpdocumentor/reflection-common": {
-        "version": "1.0.1"
-    },
-    "phpdocumentor/reflection-docblock": {
-        "version": "4.3.0"
-    },
-    "phpdocumentor/type-resolver": {
-        "version": "0.4.0"
-    },
-    "phpspec/prophecy": {
-        "version": "1.7.5"
-    },
     "phpstan/phpstan": {
         "version": "0.12.70"
     },
@@ -344,12 +314,6 @@
     "setasign/fpdi": {
         "version": "v2.0.3"
     },
-    "setasign/fpdi-tcpdf": {
-        "version": "v2.0.0"
-    },
-    "skorp/detect-incompatible-samesite-useragents": {
-        "version": "1.0.0"
-    },
     "softcreatr/jsonpath": {
         "version": "0.7.5"
     },
@@ -443,9 +407,6 @@
     "symfony/http-kernel": {
         "version": "v3.4.1"
     },
-    "symfony/inflector": {
-        "version": "v3.4.1"
-    },
     "symfony/intl": {
         "version": "v3.4.1"
     },
@@ -533,9 +494,6 @@
     "symfony/polyfill-mbstring": {
         "version": "v1.6.0"
     },
-    "symfony/polyfill-php72": {
-        "version": "v1.6.0"
-    },
     "symfony/polyfill-php73": {
         "version": "v1.13.0"
     },
@@ -581,9 +539,6 @@
     "symfony/security-csrf": {
         "version": "v3.4.1"
     },
-    "symfony/security-guard": {
-        "version": "v5.4.3"
-    },
     "symfony/security-http": {
         "version": "v5.4.5"
     },
@@ -668,9 +623,6 @@
     "twig/twig": {
         "version": "v2.4.4"
     },
-    "webmozart/assert": {
-        "version": "1.3.0"
-    },
     "zbateson/mail-mime-parser": {
         "version": "1.3.3"
     },