diff --git a/config/doctrine.php b/config/doctrine.php
index 67562f4..5b00de8 100644
--- a/config/doctrine.php
+++ b/config/doctrine.php
@@ -16,6 +16,11 @@
     // Available: null, apc, xcache, redis, memcache
     'cache_provider' => null,
 
+    // A string that will act as a prefix for cached values' keys.
+    // When left as `null`, this will be internally defaulted to:
+    // "dc2_" . md5($proxyDir) . "_", see: Doctrine\ORM\Tools\Setup
+    'cache_key_namespace' => null,
+
     'cache' => [
         'redis' => [
             'host'     => '127.0.0.1',
diff --git a/src/LaravelDoctrineServiceProvider.php b/src/LaravelDoctrineServiceProvider.php
index 4e42049..7a36517 100644
--- a/src/LaravelDoctrineServiceProvider.php
+++ b/src/LaravelDoctrineServiceProvider.php
@@ -6,6 +6,7 @@
 use Doctrine\ORM\EntityManager;
 use Doctrine\ORM\Mapping\ClassMetadataFactory;
 use Doctrine\ORM\Tools\Setup;
+use Doctrine\Common\Cache\CacheProvider;
 use Doctrine\Common\EventManager;
 use Illuminate\Auth\AuthManager;
 use Illuminate\Support\ServiceProvider;
@@ -98,11 +99,15 @@ private function registerEntityManager()
     {
         $this->app->singleton(EntityManager::class, function ($app) {
             $config = $app['config']['doctrine::doctrine'];
+
+            /** @var CacheProvider|null $cacheProvider */
+            $cacheProvider = $app['Mitch\LaravelDoctrine\CacheManager']->getCache($config['cache_provider']);
+
             $metadata = Setup::createAnnotationMetadataConfiguration(
                 $config['metadata'],
                 $app['config']['app.debug'],
                 $config['proxy']['directory'],
-                $app[CacheManager::class]->getCache($config['cache_provider']),
+                $cacheProvider,
                 $config['simple_annotations']
             );
             $metadata->addFilter('trashed', TrashedFilter::class);
@@ -124,6 +129,17 @@ private function registerEntityManager()
                 $eventManager->addEventListener(Events::loadClassMetadata, $tablePrefix);
             }
 
+            /*
+             * We need to do that here, because the namespace is defaulted in
+             * Setup::createAnnotationMetadataConfiguration
+             */
+            if (
+                isset($config['cache_key_namespace'])
+                && $cacheProvider
+            ) {
+                $cacheProvider->setNamespace($config['cache_key_namespace']);
+            }
+
             $eventManager->addEventListener(Events::onFlush, new SoftDeletableListener);
 
             $entityManager = EntityManager::create($connection_config, $metadata, $eventManager);