diff --git a/composer.json b/composer.json
index 9861d09..f46b35e 100644
--- a/composer.json
+++ b/composer.json
@@ -16,7 +16,8 @@
         "sabre/dav": "~3.1.2",
         "sabre/vobject": "^4.0",
         "easycorp/easy-log-handler": "^1.0",
-        "zendframework/zend-validator": "^2.10"
+        "zendframework/zend-validator": "^2.10",
+        "nesbot/carbon": "^1.14"
     },
     "require-dev": {
         "phpunit/phpunit" : "> 4.8, <=6.0.0"
diff --git a/src/Taskwarrior/Taskwarrior.php b/src/Taskwarrior/Taskwarrior.php
index 3f1bba2..4266a6c 100644
--- a/src/Taskwarrior/Taskwarrior.php
+++ b/src/Taskwarrior/Taskwarrior.php
@@ -42,7 +42,7 @@ class Taskwarrior {
   
     public function __construct(Config $config){
       if(!isset($config)){
-        $this->config = new Configwg();
+        $this->config = new Config();
       }
       $this->config = $config;
     }
diff --git a/src/Taskwarrior/TaskwarriorManager.php b/src/Taskwarrior/TaskwarriorManager.php
index 1ec5dc2..6014722 100644
--- a/src/Taskwarrior/TaskwarriorManager.php
+++ b/src/Taskwarrior/TaskwarriorManager.php
@@ -38,7 +38,7 @@ class TaskwarriorManager  {
 
   public function addTask(VTodo $document){
 
-         $task = $this->taskwarrior->createTask($document->UID);
+         $task = $this->taskwarrior->createTask((string)$document->UID);
 
          $task->setDescription($document);