diff --git a/module/Application/src/Application/Controller/ContributorsController.php b/module/Application/src/Application/Controller/ContributorsController.php
index b5e9e41d..e64022dc 100644
--- a/module/Application/src/Application/Controller/ContributorsController.php
+++ b/module/Application/src/Application/Controller/ContributorsController.php
@@ -13,12 +13,12 @@ class ContributorsController extends AbstractActionController
     /**
      * @var RepositoryRetriever
      */
-    protected $repositoryRetriever;
+    private $repositoryRetriever;
 
     /**
      * @var array
      */
-    protected $repositoryData;
+    private $repositoryData;
 
     /**
      * @param RepositoryRetriever $repositoryRetriever