diff --git a/composer.json b/composer.json
index f9f9f64..d754da4 100644
--- a/composer.json
+++ b/composer.json
@@ -19,6 +19,7 @@
         "sentry/sentry-symfony": "^2.2",
         "symfony/console": "^4.1",
         "symfony/dotenv": "^4.1",
+        "symfony/expression-language": "^4.1",
         "symfony/flex": "^1.0",
         "symfony/form": "^4.1",
         "symfony/framework-bundle": "^4.1",
diff --git a/composer.lock b/composer.lock
index 89a65a1..280c9e7 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": "9357f0481f1bae9e751158689364ba6b",
+    "content-hash": "affcef344df6ac8f86b6f1ab41e04968",
     "packages": [
         {
             "name": "doctrine/annotations",
@@ -2752,6 +2752,57 @@
             ],
             "time": "2019-06-20T06:46:26+00:00"
         },
+        {
+            "name": "symfony/expression-language",
+            "version": "v4.3.5",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/expression-language.git",
+                "reference": "c8b47d8820d3bf75f757eec8a2647584c14cf0c6"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/expression-language/zipball/c8b47d8820d3bf75f757eec8a2647584c14cf0c6",
+                "reference": "c8b47d8820d3bf75f757eec8a2647584c14cf0c6",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.1.3",
+                "symfony/cache": "~3.4|~4.0",
+                "symfony/service-contracts": "^1.1"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "4.3-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Component\\ExpressionLanguage\\": ""
+                },
+                "exclude-from-classmap": [
+                    "/Tests/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony ExpressionLanguage Component",
+            "homepage": "https://symfony.com",
+            "time": "2019-08-08T09:29:19+00:00"
+        },
         {
             "name": "symfony/filesystem",
             "version": "v4.3.2",
diff --git a/config/services.yaml b/config/services.yaml
index b09b9e5..ec9b802 100644
--- a/config/services.yaml
+++ b/config/services.yaml
@@ -43,4 +43,4 @@ services:
     # Torrent searcher
     App\Search\TorrentSearcher:
         arguments:
-            $em: '@doctrine.orm.magneticod_entity_manager'
+            $classMetadata: '@=service(''doctrine.orm.magneticod_entity_manager'').getClassMetadata(''App\\Magnetico\\Entity\\Torrent'')'
diff --git a/src/Search/TorrentSearcher.php b/src/Search/TorrentSearcher.php
index d4dac98..09fe611 100644
--- a/src/Search/TorrentSearcher.php
+++ b/src/Search/TorrentSearcher.php
@@ -2,9 +2,8 @@
 
 namespace App\Search;
 
-use App\Magnetico\Entity\Torrent;
 use App\Magnetico\Repository\TorrentRepository;
-use Doctrine\ORM\{EntityManagerInterface, QueryBuilder};
+use Doctrine\ORM\{Mapping\ClassMetadata, QueryBuilder};
 
 class TorrentSearcher
 {
@@ -13,13 +12,13 @@ class TorrentSearcher
     /** @var TorrentRepository */
     private $torrentRepo;
 
-    /** @var EntityManagerInterface */
-    private $em;
+    /** @var ClassMetadata */
+    private $classMetadata;
 
-    public function __construct(TorrentRepository $torrentRepo, EntityManagerInterface $em)
+    public function __construct(TorrentRepository $torrentRepo, ClassMetadata $classMetadata)
     {
         $this->torrentRepo = $torrentRepo;
-        $this->em = $em;
+        $this->classMetadata = $classMetadata;
     }
 
     public function createSearchQueryBuilder(string $query, string $orderBy = null, string $order = 'asc'): QueryBuilder
@@ -64,7 +63,7 @@ class TorrentSearcher
     {
         return (
             !\in_array($orderBy, self::ORDER_DISABLED_FIELDS, true)
-            && $this->em->getClassMetadata(Torrent::class)->hasField($orderBy)
+            && $this->classMetadata->hasField($orderBy)
         );
     }
 
@@ -76,4 +75,4 @@ class TorrentSearcher
 
         return explode(' ', $query);
     }
-}
\ No newline at end of file
+}
diff --git a/symfony.lock b/symfony.lock
index eaaf80a..e969a4b 100644
--- a/symfony.lock
+++ b/symfony.lock
@@ -158,6 +158,9 @@
     "symfony/event-dispatcher-contracts": {
         "version": "v1.1.5"
     },
+    "symfony/expression-language": {
+        "version": "v4.3.5"
+    },
     "symfony/filesystem": {
         "version": "v4.1.0"
     },