diff --git a/lib/Alchemy/Phrasea/Collection/CachedCollectionRepository.php b/lib/Alchemy/Phrasea/Collection/CachedCollectionRepository.php
index fd918a53cd..7dcf00aae4 100644
--- a/lib/Alchemy/Phrasea/Collection/CachedCollectionRepository.php
+++ b/lib/Alchemy/Phrasea/Collection/CachedCollectionRepository.php
@@ -9,20 +9,41 @@
  */
 namespace Alchemy\Phrasea\Collection;
 
+use Alchemy\Phrasea\Application;
 use Doctrine\Common\Cache\Cache;
 
 final class CachedCollectionRepository implements CollectionRepository
 {
 
-    /** @var CollectionRepository */
+    /**
+     * @var Application
+     */
+    private $app;
+
+    /**
+     * @var CollectionRepository
+     */
     private $repository;
-    /** @var Cache */
+
+    /**
+     * @var Cache
+     */
     private $cache;
-    /** @var string */
+
+    /**
+     * @var string
+     */
     private $cacheKey;
 
-    public function __construct(CollectionRepository $repository, Cache $cache, $cacheKey)
+    /**
+     * @param Application $application
+     * @param CollectionRepository $repository
+     * @param Cache $cache
+     * @param $cacheKey
+     */
+    public function __construct(Application $application, CollectionRepository $repository, Cache $cache, $cacheKey)
     {
+        $this->app = $application;
         $this->repository = $repository;
         $this->cache = $cache;
         $this->cacheKey = $cacheKey;
@@ -40,6 +61,10 @@ final class CachedCollectionRepository implements CollectionRepository
         if ($collections === false) {
             $collections = $this->repository->findAllByDatabox($databoxId);
             $this->save($cacheKey, $collections);
+        } else {
+            foreach ($collections as $collection) {
+                $collection->hydrate($this->app);
+            }
         }
 
         return $collections;
@@ -57,6 +82,8 @@ final class CachedCollectionRepository implements CollectionRepository
         if ($collection === false) {
             $collection = $this->repository->find($baseId);
             $this->save($cacheKey, $collection);
+        } else {
+            $collection->hydrate($this->app);
         }
 
         return $collection;
@@ -75,6 +102,8 @@ final class CachedCollectionRepository implements CollectionRepository
         if ($collection === false) {
             $collection = $this->repository->findByCollectionId($databoxId, $collectionId);
             $this->save($cacheKey, $collection);
+        } else {
+            $collection->hydrate($this->app);
         }
 
         return $collection;
diff --git a/lib/Alchemy/Phrasea/Collection/CollectionFactory.php b/lib/Alchemy/Phrasea/Collection/CollectionFactory.php
index bd3963fc76..18303e47df 100644
--- a/lib/Alchemy/Phrasea/Collection/CollectionFactory.php
+++ b/lib/Alchemy/Phrasea/Collection/CollectionFactory.php
@@ -21,21 +21,27 @@ class CollectionFactory
     }
 
     /**
+     * @param int $databoxId
      * @param CollectionReference $reference
      * @param array $row
      * @return \collection
      */
-    public function create(CollectionReference $reference, array $row)
+    public function create($databoxId, CollectionReference $reference, array $row)
     {
+        if ($databoxId != $reference->getDataboxId()) {
+            throw new \InvalidArgumentException('Reference does not belong to given databoxId.');
+        }
+
         return new \collection($this->app, $reference->getBaseId(), $reference, $row);
     }
 
     /**
+     * @param int $databoxId
      * @param CollectionReference[] $collectionReferences
      * @param array $rows
      * @return array
      */
-    public function createMany($collectionReferences, array $rows)
+    public function createMany($databoxId, $collectionReferences, array $rows)
     {
         Assertion::allIsInstanceOf($collectionReferences, CollectionReference::class);
 
@@ -47,7 +53,7 @@ class CollectionFactory
         }
 
         foreach ($rows as $row) {
-            $collections[$row['coll_id']] = $this->create($indexedReferences[$row['coll_id']], $row);
+            $collections[$row['coll_id']] = $this->create($databoxId, $indexedReferences[$row['coll_id']], $row);
         }
 
         return $collections;
diff --git a/lib/Alchemy/Phrasea/Collection/DbalCollectionRepository.php b/lib/Alchemy/Phrasea/Collection/DbalCollectionRepository.php
index 826894dcd3..729f47703c 100644
--- a/lib/Alchemy/Phrasea/Collection/DbalCollectionRepository.php
+++ b/lib/Alchemy/Phrasea/Collection/DbalCollectionRepository.php
@@ -53,7 +53,7 @@ class DbalCollectionRepository implements CollectionRepository
         $query = self::$query . sprintf(' WHERE coll_id IN (%s)', implode(', ', array_keys($params)));
         $rows = $connection->fetchAll($query, $params);
 
-        return $this->collectionFactory->createMany($references, $rows);
+        return $this->collectionFactory->createMany($databoxId, $references, $rows);
     }
 
     /**
@@ -74,7 +74,7 @@ class DbalCollectionRepository implements CollectionRepository
         $row = $connection->fetchAssoc($query, [ ':collectionId' => $reference->getCollectionId() ]);
 
         if ($row !== false) {
-            return $this->collectionFactory->create($reference, $row);
+            return $this->collectionFactory->create($reference->getDataboxId(), $reference, $row);
         }
 
         return null;
@@ -99,7 +99,7 @@ class DbalCollectionRepository implements CollectionRepository
         $row = $connection->fetchAssoc($query, [ ':collectionId' => $reference->getCollectionId() ]);
 
         if ($row !== false) {
-            return $this->collectionFactory->create($row['baseId'], $reference, $row);
+            return $this->collectionFactory->create($databoxId, $row['baseId'], $reference, $row);
         }
 
         return null;
diff --git a/lib/Alchemy/Phrasea/Core/Provider/RepositoriesServiceProvider.php b/lib/Alchemy/Phrasea/Core/Provider/RepositoriesServiceProvider.php
index ba279d2867..10611af301 100644
--- a/lib/Alchemy/Phrasea/Core/Provider/RepositoriesServiceProvider.php
+++ b/lib/Alchemy/Phrasea/Core/Provider/RepositoriesServiceProvider.php
@@ -158,7 +158,7 @@ class RepositoriesServiceProvider implements ServiceProviderInterface
                 $factory
             );
 
-            return new CachedCollectionRepository($repository, $app['cache'], 'collection_');
+            return new CachedCollectionRepository($app, $repository, $app['cache'], 'collection_');
         });
     }
 
diff --git a/lib/classes/collection.php b/lib/classes/collection.php
index cefde0d517..8fff1a3d64 100644
--- a/lib/classes/collection.php
+++ b/lib/classes/collection.php
@@ -236,6 +236,16 @@ EOT;
         return $collection;
     }
 
+    /**
+     * @var Application
+     */
+    protected $app;
+
+    /**
+     * @var databox
+     */
+    protected $databox;
+
     /**
      * @var CollectionReference
      */
@@ -261,21 +271,17 @@ EOT;
      */
     protected $labels = [];
 
-    /**
-     * @var databox
-     */
-    protected $databox;
-
     /**
      * @var int[]|string
      */
     protected $binary_logo;
 
     /**
-     * @var Application
+     * @param Application $app
+     * @param $baseId
+     * @param CollectionReference $reference
+     * @param array $row
      */
-    protected $app;
-
     public function __construct(Application $app, $baseId, CollectionReference $reference, array $row)
     {
         $this->app = $app;
@@ -295,6 +301,24 @@ EOT;
         ];
     }
 
+    public function __sleep()
+    {
+        return array(
+            'reference',
+            'name',
+            'preferences',
+            'pub_wm',
+            'labels',
+            'binary_logo'
+        );
+    }
+
+    public function hydrate(Application $app)
+    {
+        $this->app = $app;
+        $this->databox = $app->getApplicationBox()->get_databox($this->reference->getDataboxId());
+    }
+
     private function dispatch($eventName, CollectionEvent $event)
     {
         $this->app['dispatcher']->dispatch($eventName, $event);