diff --git a/rector.php b/rector.php
index 46b1c004d..d0654af14 100644
--- a/rector.php
+++ b/rector.php
@@ -14,4 +14,5 @@ return RectorConfig::configure()
     ])
     ->withImportNames(importShortClasses: false)
     ->withAttributesSets(doctrine: true)
+    ->withPhpSets(php55: true)
     ->withTypeCoverageLevel(0);
diff --git a/src/ParamConverter/UsernameFeedTokenConverter.php b/src/ParamConverter/UsernameFeedTokenConverter.php
index 67807efb9..6f35027ad 100644
--- a/src/ParamConverter/UsernameFeedTokenConverter.php
+++ b/src/ParamConverter/UsernameFeedTokenConverter.php
@@ -50,7 +50,7 @@ class UsernameFeedTokenConverter implements ParamConverterInterface
         $em = $this->registry->getManagerForClass($configuration->getClass());
 
         // Check, if class name is what we need
-        if (null !== $em && 'Wallabag\Entity\User' !== $em->getClassMetadata($configuration->getClass())->getName()) {
+        if (null !== $em && User::class !== $em->getClassMetadata($configuration->getClass())->getName()) {
             return false;
         }
 
diff --git a/tests/Event/Subscriber/TablePrefixSubscriberTest.php b/tests/Event/Subscriber/TablePrefixSubscriberTest.php
index fa0c37e38..2872fb23f 100644
--- a/tests/Event/Subscriber/TablePrefixSubscriberTest.php
+++ b/tests/Event/Subscriber/TablePrefixSubscriberTest.php
@@ -11,6 +11,7 @@ use Doctrine\ORM\Event\LoadClassMetadataEventArgs;
 use Doctrine\ORM\Mapping\ClassMetadata;
 use Doctrine\ORM\Mapping\DefaultQuoteStrategy;
 use PHPUnit\Framework\TestCase;
+use Wallabag\Entity\Entry;
 use Wallabag\Entity\User;
 use Wallabag\Event\Subscriber\TablePrefixSubscriber;
 
@@ -94,7 +95,7 @@ class TablePrefixSubscriberTest extends TestCase
 
         $subscriber = new TablePrefixSubscriber('yo_');
 
-        $metaClass = new ClassMetadata('Wallabag\Entity\Entry');
+        $metaClass = new ClassMetadata(Entry::class);
         $metaClass->setPrimaryTable(['name' => 'entry']);
         $metaClass->mapManyToMany([
             'fieldName' => 'tags',