diff --git a/README.md b/README.md
index e0328e1..3794b59 100644
--- a/README.md
+++ b/README.md
@@ -83,6 +83,7 @@ use Slim\App;
 // Loaded from a file
 $settings = [
     'entity_manager' => [
+        'annotation_autoloaders' => ['class_exists'],
         'connection' => [
             'driver' => 'pdo_sqlite',
             'memory' => true,
@@ -138,6 +139,7 @@ $settings = [
                 ],
             ],
             'secondaryDocumentManager' => [
+                'annotation_autoloaders' => ['class_exists'],
                 'connection' => [
                     'server' => 'mongodb://localhost:27017',
                 ],
diff --git a/composer.json b/composer.json
index 2011f71..6632235 100644
--- a/composer.json
+++ b/composer.json
@@ -26,7 +26,7 @@
   "require": {
     "php": ">=5.6",
     "slim/slim": "^3.0",
-    "juliangut/doctrine-manager-builder": "^1.0"
+    "juliangut/doctrine-manager-builder": "^1.0.2"
   },
   "require-dev": {
     "phpmd/phpmd": "^2.0",
diff --git a/src/ManagerBuilder.php b/src/ManagerBuilder.php
index c95c551..1df0318 100644
--- a/src/ManagerBuilder.php
+++ b/src/ManagerBuilder.php
@@ -9,6 +9,7 @@
 
 namespace Jgut\Slim\Doctrine;
 
+use Doctrine\Common\Annotations\AnnotationRegistry;
 use Jgut\Doctrine\ManagerBuilder\CouchDBBuilder;
 use Jgut\Doctrine\ManagerBuilder\ManagerBuilder as Builder;
 use Jgut\Doctrine\ManagerBuilder\MongoDBBuilder;
@@ -155,12 +156,16 @@ public function addBuilder(Builder $builder)
      */
     public function getManagers()
     {
-        return array_map(
+        $managers = array_map(
             function (Builder $builder) {
                 return $builder->getManager();
             },
             $this->builders
         );
+
+        AnnotationRegistry::registerLoader('class_exists');
+
+        return $managers;
     }
 
     /**
@@ -199,6 +204,8 @@ public function getCLIApplication()
             }
         }
 
+        AnnotationRegistry::registerLoader('class_exists');
+
         return $application;
     }
 }