1 files changed, 3 insertions, 3 deletions
diff --git a/Core/Role/RoleHierarchy.php b/Core/Role/RoleHierarchy.php
index 5217b53..a368a44 100644
--- a/Core/Role/RoleHierarchy.php
+++ b/Core/Role/RoleHierarchy.php
@@ -18,8 +18,8 @@ namespace Symfony\Component\Security\Core\Role;
  */
 class RoleHierarchy implements RoleHierarchyInterface
 {
-    protected $hierarchy;
-    protected $map;
+    private $hierarchy;
+    private $map;
 
     /**
      * Constructor.
@@ -56,7 +56,7 @@ class RoleHierarchy implements RoleHierarchyInterface
         return $reachableRoles;
     }
 
-    protected function buildRoleMap()
+    private function buildRoleMap()
     {
         $this->map = array();
         foreach ($this->hierarchy as $main => $roles) {