diff --git a/Models/Task.php b/Models/Task.php
index a547e74..4dde181 100644
--- a/Models/Task.php
+++ b/Models/Task.php
@@ -71,7 +71,7 @@ class Task implements \JsonSerializable
     /**
      * Type.
      *
-     * @var TaskType
+     * @var int
      * @since 1.0.0
      */
     protected $type = TaskType::SINGLE;
@@ -79,11 +79,17 @@ class Task implements \JsonSerializable
     /**
      * Status.
      *
-     * @var TaskStatus
+     * @var int
      * @since 1.0.0
      */
     protected $status = TaskStatus::OPEN;
 
+    /**
+     * Task can be closed by user.
+     *
+     * @var bool
+     * @since 1.0.0
+     */
     protected $isClosable = true;
 
     /**
diff --git a/Models/TaskMapper.php b/Models/TaskMapper.php
index 0e8a3b7..b702aff 100644
--- a/Models/TaskMapper.php
+++ b/Models/TaskMapper.php
@@ -139,7 +139,7 @@ class TaskMapper extends DataMapperAbstract
 
             $count = $sth->fetchAll()[0][0] ?? 0;
         } catch (\Exception $e) {
-            return false;
+            return -1;
         }
 
         return $count;