diff --git a/composer.json b/composer.json
index 24af29a..640f537 100644
--- a/composer.json
+++ b/composer.json
@@ -10,15 +10,15 @@
         }
     ],
     "require": {
-        "php": ">=8.2",
+        "php": ">=8.4",
         "ext-ctype": "*",
         "ext-iconv": "*",
         "ext-simplexml": "*",
         "ext-sockets": "*",
         "beberlei/doctrineextensions": "^1.5",
-        "doctrine/doctrine-bundle": "^2.10",
+        "doctrine/doctrine-bundle": "^2.15",
         "doctrine/doctrine-migrations-bundle": "^3.2",
-        "doctrine/orm": "^2.15",
+        "doctrine/orm": "^3.6",
         "flagception/flagception-bundle": "^6.0",
         "knplabs/knp-menu-bundle": "^3.2",
         "knplabs/knp-paginator-bundle": "^6.2",
diff --git a/composer.lock b/composer.lock
index 7d76a5b..f41894a 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": "2f83a821022fcd019f4192cff19af85e",
+    "content-hash": "e4ae4ad86c4c01e26d770c2ab3e0fda4",
     "packages": [
         {
             "name": "beberlei/doctrineextensions",
@@ -360,100 +360,6 @@
             },
             "time": "2024-07-08T12:26:09+00:00"
         },
-        {
-            "name": "doctrine/cache",
-            "version": "2.2.0",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/doctrine/cache.git",
-                "reference": "1ca8f21980e770095a31456042471a57bc4c68fb"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/doctrine/cache/zipball/1ca8f21980e770095a31456042471a57bc4c68fb",
-                "reference": "1ca8f21980e770095a31456042471a57bc4c68fb",
-                "shasum": ""
-            },
-            "require": {
-                "php": "~7.1 || ^8.0"
-            },
-            "conflict": {
-                "doctrine/common": ">2.2,<2.4"
-            },
-            "require-dev": {
-                "cache/integration-tests": "dev-master",
-                "doctrine/coding-standard": "^9",
-                "phpunit/phpunit": "^7.5 || ^8.5 || ^9.5",
-                "psr/cache": "^1.0 || ^2.0 || ^3.0",
-                "symfony/cache": "^4.4 || ^5.4 || ^6",
-                "symfony/var-exporter": "^4.4 || ^5.4 || ^6"
-            },
-            "type": "library",
-            "autoload": {
-                "psr-4": {
-                    "Doctrine\\Common\\Cache\\": "lib/Doctrine/Common/Cache"
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Guilherme Blanco",
-                    "email": "guilhermeblanco@gmail.com"
-                },
-                {
-                    "name": "Roman Borschel",
-                    "email": "roman@code-factory.org"
-                },
-                {
-                    "name": "Benjamin Eberlei",
-                    "email": "kontakt@beberlei.de"
-                },
-                {
-                    "name": "Jonathan Wage",
-                    "email": "jonwage@gmail.com"
-                },
-                {
-                    "name": "Johannes Schmitt",
-                    "email": "schmittjoh@gmail.com"
-                }
-            ],
-            "description": "PHP Doctrine Cache library is a popular cache implementation that supports many different drivers such as redis, memcache, apc, mongodb and others.",
-            "homepage": "https://www.doctrine-project.org/projects/cache.html",
-            "keywords": [
-                "abstraction",
-                "apcu",
-                "cache",
-                "caching",
-                "couchdb",
-                "memcached",
-                "php",
-                "redis",
-                "xcache"
-            ],
-            "support": {
-                "issues": "https://github.com/doctrine/cache/issues",
-                "source": "https://github.com/doctrine/cache/tree/2.2.0"
-            },
-            "funding": [
-                {
-                    "url": "https://www.doctrine-project.org/sponsorship.html",
-                    "type": "custom"
-                },
-                {
-                    "url": "https://www.patreon.com/phpdoctrine",
-                    "type": "patreon"
-                },
-                {
-                    "url": "https://tidelift.com/funding/github/packagist/doctrine%2Fcache",
-                    "type": "tidelift"
-                }
-            ],
-            "abandoned": true,
-            "time": "2022-05-20T20:07:39+00:00"
-        },
         {
             "name": "doctrine/collections",
             "version": "2.6.0",
@@ -540,97 +446,6 @@
             ],
             "time": "2026-01-15T10:01:58+00:00"
         },
-        {
-            "name": "doctrine/common",
-            "version": "3.5.0",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/doctrine/common.git",
-                "reference": "d9ea4a54ca2586db781f0265d36bea731ac66ec5"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/doctrine/common/zipball/d9ea4a54ca2586db781f0265d36bea731ac66ec5",
-                "reference": "d9ea4a54ca2586db781f0265d36bea731ac66ec5",
-                "shasum": ""
-            },
-            "require": {
-                "doctrine/persistence": "^2.0 || ^3.0 || ^4.0",
-                "php": "^7.1 || ^8.0"
-            },
-            "require-dev": {
-                "doctrine/coding-standard": "^9.0 || ^10.0",
-                "doctrine/collections": "^1",
-                "phpstan/phpstan": "^1.4.1",
-                "phpstan/phpstan-phpunit": "^1",
-                "phpunit/phpunit": "^7.5.20 || ^8.5 || ^9.0",
-                "squizlabs/php_codesniffer": "^3.0",
-                "symfony/phpunit-bridge": "^6.1",
-                "vimeo/psalm": "^4.4"
-            },
-            "type": "library",
-            "autoload": {
-                "psr-4": {
-                    "Doctrine\\Common\\": "src"
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Guilherme Blanco",
-                    "email": "guilhermeblanco@gmail.com"
-                },
-                {
-                    "name": "Roman Borschel",
-                    "email": "roman@code-factory.org"
-                },
-                {
-                    "name": "Benjamin Eberlei",
-                    "email": "kontakt@beberlei.de"
-                },
-                {
-                    "name": "Jonathan Wage",
-                    "email": "jonwage@gmail.com"
-                },
-                {
-                    "name": "Johannes Schmitt",
-                    "email": "schmittjoh@gmail.com"
-                },
-                {
-                    "name": "Marco Pivetta",
-                    "email": "ocramius@gmail.com"
-                }
-            ],
-            "description": "PHP Doctrine Common project is a library that provides additional functionality that other Doctrine projects depend on such as better reflection support, proxies and much more.",
-            "homepage": "https://www.doctrine-project.org/projects/common.html",
-            "keywords": [
-                "common",
-                "doctrine",
-                "php"
-            ],
-            "support": {
-                "issues": "https://github.com/doctrine/common/issues",
-                "source": "https://github.com/doctrine/common/tree/3.5.0"
-            },
-            "funding": [
-                {
-                    "url": "https://www.doctrine-project.org/sponsorship.html",
-                    "type": "custom"
-                },
-                {
-                    "url": "https://www.patreon.com/phpdoctrine",
-                    "type": "patreon"
-                },
-                {
-                    "url": "https://tidelift.com/funding/github/packagist/doctrine%2Fcommon",
-                    "type": "tidelift"
-                }
-            ],
-            "time": "2025-01-01T22:12:03+00:00"
-        },
         {
             "name": "doctrine/dbal",
             "version": "3.10.6",
@@ -1442,61 +1257,49 @@
         },
         {
             "name": "doctrine/orm",
-            "version": "2.20.13",
+            "version": "3.6.8",
             "source": {
                 "type": "git",
                 "url": "https://github.com/doctrine/orm.git",
-                "reference": "f525f32e11efc60a34f5eecd88093f476c90f90e"
+                "reference": "a4d13ed5b11e7f7b4d654b1adf95432031ae3ffc"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/doctrine/orm/zipball/f525f32e11efc60a34f5eecd88093f476c90f90e",
-                "reference": "f525f32e11efc60a34f5eecd88093f476c90f90e",
+                "url": "https://api.github.com/repos/doctrine/orm/zipball/a4d13ed5b11e7f7b4d654b1adf95432031ae3ffc",
+                "reference": "a4d13ed5b11e7f7b4d654b1adf95432031ae3ffc",
                 "shasum": ""
             },
             "require": {
                 "composer-runtime-api": "^2",
-                "doctrine/cache": "^1.12.1 || ^2.1.1",
-                "doctrine/collections": "^1.5 || ^2.1",
-                "doctrine/common": "^3.0.3",
-                "doctrine/dbal": "^2.13.1 || ^3.2",
+                "doctrine/collections": "^2.2",
+                "doctrine/dbal": "^3.8.2 || ^4",
                 "doctrine/deprecations": "^0.5.3 || ^1",
                 "doctrine/event-manager": "^1.2 || ^2",
                 "doctrine/inflector": "^1.4 || ^2.0",
                 "doctrine/instantiator": "^1.3 || ^2",
-                "doctrine/lexer": "^2 || ^3",
-                "doctrine/persistence": "^2.4 || ^3",
+                "doctrine/lexer": "^3",
+                "doctrine/persistence": "^3.3.1 || ^4",
                 "ext-ctype": "*",
-                "php": "^7.1 || ^8.0",
+                "php": "^8.1",
                 "psr/cache": "^1 || ^2 || ^3",
-                "symfony/console": "^4.2 || ^5.0 || ^6.0 || ^7.0 || ^8.0",
-                "symfony/polyfill-php72": "^1.23",
-                "symfony/polyfill-php80": "^1.16"
-            },
-            "conflict": {
-                "doctrine/annotations": "<1.13 || >= 3.0"
+                "symfony/console": "^5.4 || ^6.0 || ^7.0 || ^8.0",
+                "symfony/var-exporter": "^6.3.9 || ^7.0 || ^8.0"
             },
             "require-dev": {
-                "doctrine/annotations": "^1.13 || ^2",
-                "doctrine/coding-standard": "^9.0.2 || ^14.0",
-                "phpbench/phpbench": "^0.16.10 || ^1.0",
-                "phpstan/extension-installer": "~1.1.0 || ^1.4",
-                "phpstan/phpstan": "~1.4.10 || 2.1.23",
-                "phpstan/phpstan-deprecation-rules": "^1 || ^2",
-                "phpunit/phpunit": "^7.5 || ^8.5 || ^9.6",
+                "doctrine/coding-standard": "^14.0",
+                "phpbench/phpbench": "^1.0",
+                "phpstan/extension-installer": "^1.4",
+                "phpstan/phpstan": "2.1.23",
+                "phpstan/phpstan-deprecation-rules": "^2",
+                "phpunit/phpunit": "^10.5.0 || ^11.5",
                 "psr/log": "^1 || ^2 || ^3",
-                "symfony/cache": "^4.4 || ^5.4 || ^6.4 || ^7.0",
-                "symfony/var-exporter": "^4.4 || ^5.4 || ^6.2 || ^7.0",
-                "symfony/yaml": "^3.4 || ^4.0 || ^5.0 || ^6.0 || ^7.0 || ^8.0"
+                "symfony/cache": "^5.4 || ^6.2 || ^7.0 || ^8.0"
             },
             "suggest": {
+                "ext-deepclone": "Improves performance when not using native lazy objects (Symfony 8.1+)",
                 "ext-dom": "Provides support for XSD validation for XML mapping files",
-                "symfony/cache": "Provides cache support for Setup Tool with doctrine/cache 2.0",
-                "symfony/yaml": "If you want to use YAML Metadata Mapping Driver"
+                "symfony/cache": "Provides cache support for Setup Tool with doctrine/cache 2.0"
             },
-            "bin": [
-                "bin/doctrine"
-            ],
             "type": "library",
             "autoload": {
                 "psr-4": {
@@ -1537,40 +1340,38 @@
             ],
             "support": {
                 "issues": "https://github.com/doctrine/orm/issues",
-                "source": "https://github.com/doctrine/orm/tree/2.20.13"
+                "source": "https://github.com/doctrine/orm/tree/3.6.8"
             },
-            "time": "2026-05-25T05:46:05+00:00"
+            "time": "2026-08-05T19:05:32+00:00"
         },
         {
             "name": "doctrine/persistence",
-            "version": "3.4.5",
+            "version": "4.2.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/doctrine/persistence.git",
-                "reference": "703a29d8597336fb75f42eeabcdf3f2863156ca8"
+                "reference": "49ab73e0d3e2ac8d1f5ecda3dd8acd5503781e8b"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/doctrine/persistence/zipball/703a29d8597336fb75f42eeabcdf3f2863156ca8",
-                "reference": "703a29d8597336fb75f42eeabcdf3f2863156ca8",
+                "url": "https://api.github.com/repos/doctrine/persistence/zipball/49ab73e0d3e2ac8d1f5ecda3dd8acd5503781e8b",
+                "reference": "49ab73e0d3e2ac8d1f5ecda3dd8acd5503781e8b",
                 "shasum": ""
             },
             "require": {
+                "doctrine/deprecations": "^1",
                 "doctrine/event-manager": "^1 || ^2",
-                "php": "^7.2 || ^8.0",
+                "php": "^8.1",
                 "psr/cache": "^1.0 || ^2.0 || ^3.0"
             },
-            "conflict": {
-                "doctrine/common": "<2.10"
-            },
             "require-dev": {
-                "doctrine/coding-standard": "^12 || ^14",
-                "doctrine/common": "^3.0",
-                "phpstan/phpstan": "^1 || 2.1.30",
-                "phpstan/phpstan-phpunit": "^1 || ^2",
-                "phpstan/phpstan-strict-rules": "^1 || ^2",
-                "phpunit/phpunit": "^8.5.38 || ^9.5",
-                "symfony/cache": "^4.4 || ^5.4 || ^6.0 || ^7.0"
+                "doctrine/coding-standard": "^14",
+                "phpstan/phpstan": "2.1.30",
+                "phpstan/phpstan-phpunit": "^2",
+                "phpstan/phpstan-strict-rules": "^2",
+                "phpunit/phpunit": "^10.5.58 || ^12",
+                "symfony/cache": "^4.4 || ^5.4 || ^6.0 || ^7.0 || ^8.0",
+                "symfony/finder": "^4.4 || ^5.4 || ^6.0 || ^7.0 || ^8.0"
             },
             "type": "library",
             "autoload": {
@@ -1619,7 +1420,7 @@
             ],
             "support": {
                 "issues": "https://github.com/doctrine/persistence/issues",
-                "source": "https://github.com/doctrine/persistence/tree/3.4.5"
+                "source": "https://github.com/doctrine/persistence/tree/4.2.0"
             },
             "funding": [
                 {
@@ -1635,7 +1436,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2026-06-13T19:29:35+00:00"
+            "time": "2026-04-26T12:12:52+00:00"
         },
         {
             "name": "doctrine/sql-formatter",
@@ -15963,7 +15764,7 @@
     "prefer-stable": true,
     "prefer-lowest": false,
     "platform": {
-        "php": ">=8.2",
+        "php": ">=8.4",
         "ext-ctype": "*",
         "ext-iconv": "*",
         "ext-simplexml": "*",
diff --git a/config/packages/doctrine.yaml b/config/packages/doctrine.yaml
index daf9bb6..1fd2e72 100644
--- a/config/packages/doctrine.yaml
+++ b/config/packages/doctrine.yaml
@@ -7,7 +7,7 @@ doctrine:
         # either here or in the DATABASE_URL env var (see .env file)
         #server_version: '15'
     orm:
-        auto_generate_proxy_classes: true
+        enable_native_lazy_objects: true
         # Keep implicit controller-argument entity resolution on (many actions type-hint
         # an entity against a matching {id}/{uuid} route param without #[MapEntity]).
         # Setting this explicitly silences the "default will flip to false" deprecation;
@@ -15,7 +15,6 @@ doctrine:
         # migrated to #[MapEntity], which is its own task.
         controller_resolver:
             auto_mapping: true
-        enable_lazy_ghost_objects: true
         report_fields_where_declared: true
         validate_xml_mapping: true
         naming_strategy: doctrine.orm.naming_strategy.underscore_number_aware
@@ -42,8 +41,6 @@ when@test:
 when@prod:
     doctrine:
         orm:
-            auto_generate_proxy_classes: false
-            proxy_dir: '%kernel.build_dir%/doctrine/orm/Proxies'
             query_cache_driver:
                 type: pool
                 pool: doctrine.system_cache_pool
diff --git a/deploy.php b/deploy.php
index 26005d2..e2c2cec 100644
--- a/deploy.php
+++ b/deploy.php
@@ -103,6 +103,7 @@ task('deploy', [
     'deploy:lock',
     'deploy:release',
     'deploy:assets',
+    'deploy:check-platform',
     'rsync',
     'deploy:shared',
     'deploy:writable',
@@ -113,6 +114,10 @@ task('deploy', [
     'deploy:stop-workers',
 ]);
 
+task('deploy:check-platform', function () {
+    runLocally('composer check-platform-reqs');
+});
+
 task('deploy:stop-workers', function () {
     run('{{bin/console}} messenger:stop-workers');
 });
diff --git a/docs/operations.md b/docs/operations.md
index 60c816a..518ae54 100644
--- a/docs/operations.md
+++ b/docs/operations.md
@@ -54,7 +54,12 @@ Why each part is the way it is:
   explicitly for both hosts, because the host's default CLI is not the right one. Cron's
   `PATH` is typically only `/usr/bin:/bin`. `vendor/` is rsynced from a developer machine
   and there is no `deploy:vendors`, so the CLI must match the PHP the dependencies were
-  installed against (8.3).
+  installed against (8.4). Deployments run `composer check-platform-reqs` locally before
+  rsync; because `config.platform.php` is pinned in `composer.json`, this only verifies
+  that the locked dependencies resolve against the PHP and extension set we target — it
+  does not probe the staging or production runtime. Keeping both FPM and
+  `/usr/local/bin/php` on staging and production at PHP 8.4 is a manual precondition of
+  every deploy.
 - **`--time-limit=300`** on the mailing worker. An 800-recipient mailing needs roughly
   200–360 seconds of worker time — the fan-out renders 800 Twig bodies and inserts 800
   rows, then the mails go out at about 3–5 per second over a reused SMTP connection. So a
diff --git a/tests/BusProNet/UserDataHandlerTest.php b/tests/BusProNet/UserDataHandlerTest.php
index fd37339..455cf4f 100644
--- a/tests/BusProNet/UserDataHandlerTest.php
+++ b/tests/BusProNet/UserDataHandlerTest.php
@@ -14,7 +14,7 @@ use App\Entity\Embeddable\Communication;
 use App\Entity\Teamer;
 use App\Entity\User;
 use Doctrine\ORM\EntityManagerInterface;
-use Doctrine\Persistence\ObjectRepository;
+use Doctrine\ORM\EntityRepository;
 use PHPUnit\Framework\MockObject\MockObject;
 use PHPUnit\Framework\TestCase;
 use Psr\Log\LoggerInterface;
@@ -511,7 +511,7 @@ class UserDataHandlerTest extends TestCase
 
         $profileResponse = $this->createProfileResponse();
 
-        $repository = $this->createMock(ObjectRepository::class);
+        $repository = $this->createMock(EntityRepository::class);
         $repository
             ->expects($this->once())
             ->method('findOneBy')
@@ -562,7 +562,7 @@ class UserDataHandlerTest extends TestCase
 
         $profileResponse = $this->createProfileResponse();
 
-        $repository = $this->createMock(ObjectRepository::class);
+        $repository = $this->createMock(EntityRepository::class);
         $repository
             ->expects($this->once())
             ->method('findOneBy')
@@ -607,7 +607,7 @@ class UserDataHandlerTest extends TestCase
 
         $profileResponse = $this->createProfileResponse(null, null);
 
-        $repository = $this->createMock(ObjectRepository::class);
+        $repository = $this->createMock(EntityRepository::class);
         $repository
             ->expects($this->once())
             ->method('findOneBy')
@@ -669,7 +669,7 @@ class UserDataHandlerTest extends TestCase
 
         $profileResponse = $this->createProfileResponse();
 
-        $repository = $this->createMock(ObjectRepository::class);
+        $repository = $this->createMock(EntityRepository::class);
         $repository
             ->expects($this->once())
             ->method('findOneBy')
diff --git a/tests/Security/MyEpAuthenticatorTest.php b/tests/Security/MyEpAuthenticatorTest.php
index f6d673c..c189995 100644
--- a/tests/Security/MyEpAuthenticatorTest.php
+++ b/tests/Security/MyEpAuthenticatorTest.php
@@ -10,7 +10,7 @@ use App\RequiredTeamerCheck\RequiredTeamerCheckRegistry;
 use App\Security\MyEpAuthenticator;
 use App\Security\OAuth2\MyEpClient;
 use Doctrine\ORM\EntityManagerInterface;
-use Doctrine\Persistence\ObjectRepository;
+use Doctrine\ORM\EntityRepository;
 use Flagception\Manager\FeatureManagerInterface;
 use GuzzleHttp\Psr7\Request as Psr7Request;
 use GuzzleHttp\Psr7\Response as Psr7Response;
@@ -30,7 +30,7 @@ use Symfony\Component\Security\Http\Authenticator\Passport\Badge\UserBadge;
 class MyEpAuthenticatorTest extends TestCase
 {
     private EntityManagerInterface&MockObject $entityManager;
-    private ObjectRepository&MockObject $repository;
+    private EntityRepository&MockObject $repository;
 
     /** @var User[] */
     private array $persisted = [];
@@ -38,7 +38,7 @@ class MyEpAuthenticatorTest extends TestCase
     protected function setUp(): void
     {
         $this->persisted = [];
-        $this->repository = $this->createMock(ObjectRepository::class);
+        $this->repository = $this->createMock(EntityRepository::class);
         $this->entityManager = $this->createMock(EntityManagerInterface::class);
         $this->entityManager->method('getRepository')->willReturn($this->repository);
         $this->entityManager