diff --git a/src/Bundle/ChillDocStoreBundle/Entity/StoredObject.php b/src/Bundle/ChillDocStoreBundle/Entity/StoredObject.php
index c512dba73..d5afd4a28 100644
--- a/src/Bundle/ChillDocStoreBundle/Entity/StoredObject.php
+++ b/src/Bundle/ChillDocStoreBundle/Entity/StoredObject.php
@@ -109,12 +109,12 @@ class StoredObject implements AsyncFileInterface, Document
         return $this->id;
     }
 
-    public function getIv()
+    public function getIv(): array
     {
         return $this->iv;
     }
 
-    public function getKeyInfos()
+    public function getKeyInfos(): array
     {
         return $this->keyInfos;
     }
@@ -163,21 +163,21 @@ class StoredObject implements AsyncFileInterface, Document
         return $this;
     }
 
-    public function setIv($iv)
+    public function setIv(array $iv)
     {
         $this->iv = $iv;
 
         return $this;
     }
 
-    public function setKeyInfos($keyInfos)
+    public function setKeyInfos(array $keyInfos)
     {
         $this->keyInfos = $keyInfos;
 
         return $this;
     }
 
-    public function setType($type)
+    public function setType(string $type)
     {
         $this->type = $type;