diff --git a/core/lib/Thelia/Model/Category.php b/core/lib/Thelia/Model/Category.php
index c5ab471a5..298650626 100644
--- a/core/lib/Thelia/Model/Category.php
+++ b/core/lib/Thelia/Model/Category.php
@@ -3,18 +3,22 @@
 namespace Thelia\Model;
 
 use Thelia\Core\Event\Category\CategoryEvent;
+use Thelia\Files\FileModelParentInterface;
 use Thelia\Model\Base\Category as BaseCategory;
 
 use Thelia\Core\Event\TheliaEvents;
 use Propel\Runtime\Connection\ConnectionInterface;
+use Thelia\Model\Tools\ModelEventDispatcherTrait;
+use Thelia\Model\Tools\PositionManagementTrait;
+use Thelia\Model\Tools\UrlRewritingTrait;
 
-class Category extends BaseCategory
+class Category extends BaseCategory implements FileModelParentInterface
 {
-    use \Thelia\Model\Tools\ModelEventDispatcherTrait;
+    use ModelEventDispatcherTrait;
 
-    use \Thelia\Model\Tools\PositionManagementTrait;
+    use PositionManagementTrait;
 
-    use \Thelia\Model\Tools\UrlRewritingTrait;
+    use UrlRewritingTrait;
 
     /**
      * @return int number of child for the current category
diff --git a/core/lib/Thelia/Model/CategoryDocument.php b/core/lib/Thelia/Model/CategoryDocument.php
index 4b20d8a59..3e13863bb 100644
--- a/core/lib/Thelia/Model/CategoryDocument.php
+++ b/core/lib/Thelia/Model/CategoryDocument.php
@@ -2,16 +2,22 @@
 
 namespace Thelia\Model;
 
+use Propel\Runtime\ActiveQuery\ModelCriteria;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\Routing\Router;
+use Thelia\Core\HttpFoundation\Request;
+use Thelia\Files\FileModelParentInterface;
+use Thelia\Form\BaseForm;
+use Thelia\Form\CategoryDocumentModification;
 use Thelia\Model\Base\CategoryDocument as BaseCategoryDocument;
 use Propel\Runtime\Connection\ConnectionInterface;
 use Thelia\Model\Breadcrumb\BreadcrumbInterface;
 use Thelia\Model\Breadcrumb\CatalogBreadcrumbTrait;
+use Thelia\Files\FileModelInterface;
 use Thelia\Model\Tools\PositionManagementTrait;
 use Thelia\Model\Tools\ModelEventDispatcherTrait;
 
-class CategoryDocument extends BaseCategoryDocument implements BreadcrumbInterface
+class CategoryDocument extends BaseCategoryDocument implements BreadcrumbInterface, FileModelInterface
 {
     use ModelEventDispatcherTrait;
     use PositionManagementTrait;
@@ -19,6 +25,8 @@ class CategoryDocument extends BaseCategoryDocument implements BreadcrumbInterfa
 
     /**
      * Calculate next position relative to our parent
+     *
+     * @param CategoryDocumentQuery $query
      */
     protected function addCriteriaToPositionQuery($query)
     {
@@ -36,11 +44,7 @@ class CategoryDocument extends BaseCategoryDocument implements BreadcrumbInterfa
     }
 
     /**
-     * Set Document parent id
-     *
-     * @param int $parentId parent id
-     *
-     * @return $this
+     * @inheritdoc
      */
     public function setParentId($parentId)
     {
@@ -50,9 +54,7 @@ class CategoryDocument extends BaseCategoryDocument implements BreadcrumbInterfa
     }
 
     /**
-     * Get Document parent id
-     *
-     * @return int parent id
+     * @inheritdoc
      */
     public function getParentId()
     {
@@ -71,13 +73,68 @@ class CategoryDocument extends BaseCategoryDocument implements BreadcrumbInterfa
     }
 
     /**
-     *
-     * return the complete breadcrumb for a given resource.
-     *
-     * @return array
+     * @inheritdoc
      */
-    public function getBreadcrumb(Router $router, ContainerInterface $container, $tab)
+    public function getBreadcrumb(Router $router, ContainerInterface $container, $tab, $locale)
     {
-        return $this->getCategoryBreadcrumb($router, $container, $tab);
+        return $this->getCategoryBreadcrumb($router, $container, $tab, $locale);
+    }
+
+    /**
+     * @return FileModelParentInterface the parent file model
+     */
+    public function getParentFileModel()
+    {
+        return new Category();
+    }
+
+    /**
+     * Get the ID of the form used to change this object information
+     *
+     * @return BaseForm the form
+     */
+    public function getUpdateFormId()
+    {
+        return 'thelia.admin.category.document.modification';
+    }
+
+    /**
+     * Get the form instance used to change this object information
+     *
+     * @param \Thelia\Core\HttpFoundation\Request $request
+     *
+     * @return BaseForm the form
+     */
+    public function getUpdateFormInstance(Request $request)
+    {
+        return new CategoryDocumentModification($request);
+    }
+
+    /**
+     * @return string the path to the upload directory where files are stored, without final slash
+     */
+    public function getUploadDir()
+    {
+        return THELIA_LOCAL_DIR . 'media'.DS.'documents'.DS.'category';
+    }
+
+    /**
+     * @param int $objectId the ID of the object
+     *
+     * @return string the URL to redirect to after update from the back-office
+     */
+    public function getRedirectionUrl($objectId)
+    {
+        return '/admin/categories/update?category_id=' . $objectId . '?current_tab=document';
+    }
+
+    /**
+     * Get the Query instance for this object
+     *
+     * @return ModelCriteria
+     */
+    public function getQueryInstance()
+    {
+        return CategoryDocumentQuery::create();
     }
 }