diff --git a/src/Doctrine/PolyglotListener.php b/src/Doctrine/PolyglotListener.php
index b83b02d..eb4b67e 100644
--- a/src/Doctrine/PolyglotListener.php
+++ b/src/Doctrine/PolyglotListener.php
@@ -94,7 +94,7 @@ private function injectPersistentTranslatables(EntityManager $entityManager, obj
 
     public function preFlush(PreFlushEventArgs $event): void
     {
-        $em = $event->getEntityManager();
+        $em = $event->getObjectManager();
 
         foreach ($this->entitiesWithTranslatables as $key => $weakRef) {
             $object = $weakRef->get();
@@ -146,21 +146,21 @@ private function loadTranslationMetadataForClass($className, EntityManager $em):
         }
 
         $metadataFactory = $em->getMetadataFactory();
-        $cacheDriver = $em->getConfiguration()->getMetadataCacheImpl();
+        $cache = $em->getConfiguration()->getMetadataCache();
 
-        if ($cacheDriver) {
-            if (($data = $cacheDriver->fetch($className.self::CACHE_SALT)) !== false) {
-                if (null === $data) {
-                    $this->translatedClasses[$className] = null;
+        if ($cache?->hasItem($className.self::CACHE_SALT)) {
+            $item = $cache->getItem($className.self::CACHE_SALT);
+            $data = $item->get();
+            if (null === $data) {
+                $this->translatedClasses[$className] = null;
 
-                    return null;
-                } else {
-                    $wakeup = TranslatableClassMetadata::wakeup($data);
-                    $wakeup->setLogger($this->logger);
-                    $this->translatedClasses[$className] = $wakeup;
+                return null;
+            } else {
+                $wakeup = TranslatableClassMetadata::wakeup($data);
+                $wakeup->setLogger($this->logger);
+                $this->translatedClasses[$className] = $wakeup;
 
-                    return $wakeup;
-                }
+                return $wakeup;
             }
         }
 
@@ -173,7 +173,11 @@ private function loadTranslationMetadataForClass($className, EntityManager $em):
         }
 
         // Save if cache driver available
-        $cacheDriver?->save($className.self::CACHE_SALT, $meta?->sleep());
+        if ($cache) {
+            $item = $cache->getItem($className.self::CACHE_SALT);
+            $item->set($meta?->sleep());
+            $cache->save($item);
+        }
 
         return $meta;
     }
diff --git a/src/Doctrine/TranslatableStringType.php b/src/Doctrine/TranslatableStringType.php
index 7c5b565..e0e1b15 100644
--- a/src/Doctrine/TranslatableStringType.php
+++ b/src/Doctrine/TranslatableStringType.php
@@ -21,7 +21,7 @@ public function getSQLDeclaration(array $column, AbstractPlatform $platform): st
             return $platform->getClobTypeDeclarationSQL($column);
         }
 
-        return $platform->getVarcharTypeDeclarationSQL($column);
+        return $platform->getStringTypeDeclarationSQL($column);
     }
 
     public function getName(): string