diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 887606a..aef62d4 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -11,7 +11,6 @@ jobs:
     strategy:
       matrix:
         php-version:
-        - "8.1"
         - "8.2"
         - "8.3"
     steps:
diff --git a/LICENSE b/LICENSE
index a60a90f..2e87993 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,7 +1,7 @@
 The olvlvl/symfony-dependency-injection-proxy package is free software.
 It is released under the terms of the following BSD License.
 
-Copyright (c) 2018-2023 by Olivier Laviale
+Copyright (c) 2018-present by Olivier Laviale
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without modification,
diff --git a/MIGRATION.md b/MIGRATION.md
index 828dbe5..5e8f5bf 100644
--- a/MIGRATION.md
+++ b/MIGRATION.md
@@ -1,5 +1,30 @@
 # Migration
 
+## v5.x to v6.0
+
+### New requirements
+
+- Requires PHP v8.2+
+- Requires `symfony/dependency-injection` v7.0+
+
+### New features
+
+N/A
+
+### Backward Incompatible Changes
+
+N/A
+
+### Deprecated Features
+
+N/A
+
+### Other Changes
+
+N/A
+
+
+
 ## v4.x to v5.0
 
 ### New requirements
diff --git a/Makefile b/Makefile
index c7784d4..de60de6 100644
--- a/Makefile
+++ b/Makefile
@@ -25,12 +25,7 @@ test-cleanup:
 	@rm -rf tests/sandbox/*
 
 .PHONY: test-container
-test-container: test-container-81
-
-.PHONY: test-container-81
-test-container-81:
-	@-docker-compose run --rm app81 bash
-	@docker-compose down -v
+test-container: test-container-82
 
 .PHONY: test-container-82
 test-container-82:
diff --git a/composer.json b/composer.json
index 5f77deb..17c1d6a 100644
--- a/composer.json
+++ b/composer.json
@@ -19,14 +19,14 @@
 	"prefer-stable": true,
 	"prefer-dist": true,
     "require": {
-        "php": ">=8.1",
+        "php": ">=8.2",
         "ext-json": "*",
-        "symfony/dependency-injection": "^6.3"
+        "symfony/dependency-injection": "^7.0"
     },
     "require-dev": {
         "phpstan/phpstan": "^1.10",
         "phpunit/phpunit": "^10.5",
-        "symfony/config": "^6.3"
+        "symfony/config": "^7.0"
     },
     "autoload": {
         "psr-4": {
diff --git a/docker-compose.yaml b/docker-compose.yaml
index fd6946e..4f87071 100644
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -1,16 +1,6 @@
 ---
 version: "3.2"
 services:
-  app81:
-    build:
-      context: .
-      args:
-        PHP_VERSION: "8.1"
-    environment:
-      PHP_IDE_CONFIG: "serverName=symfony-di-proxy"
-    volumes:
-    - .:/app:delegated
-    - ~/.composer:/root/.composer:delegated
   app82:
     build:
       context: .
diff --git a/lib/FactoryRenderer.php b/lib/FactoryRenderer.php
index ea5a6c0..8526722 100644
--- a/lib/FactoryRenderer.php
+++ b/lib/FactoryRenderer.php
@@ -18,10 +18,10 @@
 use function array_map;
 use function implode;
 
-class FactoryRenderer
+readonly class FactoryRenderer
 {
     public function __construct(
-        private readonly MethodRenderer $methodRenderer
+        private MethodRenderer $methodRenderer
     ) {
     }
 
diff --git a/lib/ProxyDumper.php b/lib/ProxyDumper.php
index 6d7bf20..c972458 100644
--- a/lib/ProxyDumper.php
+++ b/lib/ProxyDumper.php
@@ -23,18 +23,18 @@
 use function ltrim;
 use function sprintf;
 
-final class ProxyDumper implements DumperInterface
+final readonly class ProxyDumper implements DumperInterface
 {
     public function __construct(
-        private readonly InterfaceResolver $interfaceResolver = new BasicInterfaceResolver(),
-        private readonly FactoryRenderer $factoryRenderer = new FactoryRenderer(new MethodRenderer()),
+        private InterfaceResolver $interfaceResolver = new BasicInterfaceResolver(),
+        private FactoryRenderer $factoryRenderer = new FactoryRenderer(new MethodRenderer()),
     ) {
     }
 
     /**
      * @inheritdoc
      */
-    public function isProxyCandidate(Definition $definition): bool
+    public function isProxyCandidate(Definition $definition, bool &$asGhostObject = null, string $id = null): bool
     {
         $class = $definition->getClass();
 
@@ -76,7 +76,7 @@ public function getProxyFactoryCode(Definition $definition, string $id, string $
     /**
      * @inheritdoc
      */
-    public function getProxyCode(Definition $definition): string
+    public function getProxyCode(Definition $definition, string $id = null): string
     {
         return '';
     }