diff --git a/README.md b/README.md
index b089539..e3d05c9 100644
--- a/README.md
+++ b/README.md
@@ -157,6 +157,28 @@ reopen task:
 $tm->reopen($task);
 ```
 
+dependencies:
+
+```php
+$task1 = new Task();
+$task1->setDescription('a');
+
+$task2 = new Task();
+$task2->setDescription('b');
+
+$task1->addDependency($task2);
+
+// the order is important!
+$tm->save($task2);
+$tm->save($task1);
+
+$tm->clear(); // clear object cache
+
+$task1 = $tm->find('uuid-from-task1');
+$task2 = $task1->getDependencies()[0];
+echo $task2->getDesciption(); // "b" <- lazy loading
+```
+
 ### QueryBuilder
 
 example:
diff --git a/composer.json b/composer.json
index f08e741..1e1e6bd 100644
--- a/composer.json
+++ b/composer.json
@@ -23,7 +23,8 @@
         "nesbot/carbon": "^1.14",
         "doctrine/collections": "^1.3",
         "webmozart/path-util": "^2.0",
-        "webmozart/assert": "^1.0.1"
+        "webmozart/assert": "^1.0.1",
+        "ocramius/proxy-manager": "^1.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^4.0",
diff --git a/src/Exception/ReferenceException.php b/src/Exception/ReferenceException.php
new file mode 100644
index 0000000..a72e981
--- /dev/null
+++ b/src/Exception/ReferenceException.php
@@ -0,0 +1,10 @@
+<?php
+
+namespace DavidBadura\Taskwarrior\Exception;
+
+/**
+ * @author David Badura <d.a.badura@gmail.com>
+ */
+class ReferenceException extends TaskwarriorException
+{
+}
diff --git a/src/Serializer/Handler/DependsHandler.php b/src/Serializer/Handler/DependsHandler.php
new file mode 100644
index 0000000..fbda42d
--- /dev/null
+++ b/src/Serializer/Handler/DependsHandler.php
@@ -0,0 +1,99 @@
+<?php
+
+namespace DavidBadura\Taskwarrior\Serializer\Handler;
+
+use DavidBadura\Taskwarrior\Exception\ReferenceException;
+use DavidBadura\Taskwarrior\Task;
+use DavidBadura\Taskwarrior\TaskManager;
+use Doctrine\Common\Collections\ArrayCollection;
+use JMS\Serializer\Context;
+use JMS\Serializer\GraphNavigator;
+use JMS\Serializer\Handler\SubscribingHandlerInterface;
+use JMS\Serializer\VisitorInterface;
+
+/**
+ * @author David Badura <d.a.badura@gmail.com>
+ */
+class DependsHandler implements SubscribingHandlerInterface
+{
+    /**
+     * @var TaskManager
+     */
+    protected $taskManager;
+
+    /**
+     * @param TaskManager $taskManager
+     */
+    function __construct(TaskManager $taskManager)
+    {
+        $this->taskManager = $taskManager;
+    }
+
+    /**
+     * @return array
+     */
+    public static function getSubscribingMethods()
+    {
+        $methods = array();
+
+        $methods[] = array(
+            'type'      => 'Depends',
+            'format'    => 'json',
+            'direction' => GraphNavigator::DIRECTION_DESERIALIZATION,
+            'method'    => 'deserialize'
+        );
+
+        $methods[] = array(
+            'type'      => 'Depends',
+            'format'    => 'json',
+            'direction' => GraphNavigator::DIRECTION_SERIALIZATION,
+            'method'    => 'serialize'
+        );
+
+        return $methods;
+    }
+
+    /**
+     * @param VisitorInterface $visitor
+     * @param Task[] $tasks
+     * @param array $type
+     * @param Context $context
+     * @return string
+     * @throws ReferenceException
+     */
+    public function serialize(VisitorInterface $visitor, $tasks, array $type, Context $context)
+    {
+        $list = [];
+
+        foreach ($tasks as $task) {
+            if (!$task->getUuid()) {
+                throw new ReferenceException("you can't save a task that has dependencies to tasks that have not been saved");
+            }
+
+            $list[] = $task->getUuid();
+        }
+
+        return $visitor->visitString(implode(',', $list), $type, $context);
+    }
+
+    /**
+     * @param VisitorInterface $visitor
+     * @param string $data
+     * @param array $type
+     * @return ArrayCollection
+     */
+    public function deserialize(VisitorInterface $visitor, $data, array $type)
+    {
+        if (!$data) {
+            return new ArrayCollection();
+        }
+
+        $tasks = [];
+
+        foreach (explode(',', $data) as $uuid) {
+            $tasks[] = $this->taskManager->getReference($uuid);
+        }
+
+        return new ArrayCollection($tasks);
+    }
+}
diff --git a/src/Task.php b/src/Task.php
index b6a265d..adcc979 100644
--- a/src/Task.php
+++ b/src/Task.php
@@ -4,6 +4,7 @@ namespace DavidBadura\Taskwarrior;
 
 use Carbon\Carbon;
 use DavidBadura\Taskwarrior\Exception\DatetimeParseException;
+use Doctrine\Common\Collections\ArrayCollection;
 use JMS\Serializer\Annotation as JMS;
 
 /**
@@ -126,6 +127,13 @@ class Task
      */
     private $status;
 
+    /**
+     * @var Task[]|ArrayCollection
+     *
+     * @JMS\Type("Depends")
+     */
+    private $depends;
+
     /**
      *
      */
@@ -134,6 +142,7 @@ class Task
         $this->urgency = 0;
         $this->entry   = new Carbon('now');
         $this->status  = self::STATUS_PENDING;
+        $this->depends = new ArrayCollection();
     }
 
     /**
@@ -268,6 +277,42 @@ class Task
         }
     }
 
+    /**
+     * @return Task[]|ArrayCollection
+     */
+    public function getDependencies()
+    {
+        return $this->depends;
+    }
+
+    /**
+     * @param Task $task
+     */
+    public function addDependency(Task $task)
+    {
+        $this->depends->add($task);
+    }
+
+    /**
+     * @param Task $task
+     */
+    public function removeDependency(Task $task)
+    {
+        $this->depends->removeElement($task);
+    }
+
+    /**
+     * @param Task[] $tasks
+     */
+    public function setDependencies(array $tasks)
+    {
+        $this->depends = new ArrayCollection();
+
+        foreach ($tasks as $task) {
+            $this->addDependency($task);
+        }
+    }
+
     /**
      * @return Recurring
      */
@@ -429,4 +474,4 @@ class Task
         $this->entry  = new Carbon('now');
         $this->status = self::STATUS_PENDING;
     }
-}
\ No newline at end of file
+}
diff --git a/src/TaskManager.php b/src/TaskManager.php
index 8379c2a..e0b798c 100644
--- a/src/TaskManager.php
+++ b/src/TaskManager.php
@@ -4,10 +4,13 @@ namespace DavidBadura\Taskwarrior;
 
 use DavidBadura\Taskwarrior\Config\Context;
 use DavidBadura\Taskwarrior\Config\Report;
+use DavidBadura\Taskwarrior\Exception\ReferenceException;
 use DavidBadura\Taskwarrior\Exception\TaskwarriorException;
 use DavidBadura\Taskwarrior\Query\QueryBuilder;
 use DavidBadura\Taskwarrior\Serializer\Handler\CarbonHandler;
+use DavidBadura\Taskwarrior\Serializer\Handler\DependsHandler;
 use DavidBadura\Taskwarrior\Serializer\Handler\RecurringHandler;
+use DavidBadura\Taskwarrior\Serializer\Handler\TaskHandler;
 use Doctrine\Common\Collections\ArrayCollection;
 use JMS\Serializer\Handler\HandlerRegistryInterface;
 use JMS\Serializer\JsonSerializationVisitor;
@@ -15,6 +18,9 @@ use JMS\Serializer\Naming\CamelCaseNamingStrategy;
 use JMS\Serializer\Naming\SerializedNameAnnotationStrategy;
 use JMS\Serializer\Serializer;
 use JMS\Serializer\SerializerBuilder;
+use ProxyManager\Factory\LazyLoadingGhostFactory;
+use ProxyManager\Factory\LazyLoadingValueHolderFactory;
+use ProxyManager\Proxy\LazyLoadingInterface;
 
 /**
  * @author David Badura <d.a.badura@gmail.com>
@@ -285,6 +291,38 @@ class TaskManager
             ->getResult();
     }
 
+    /**
+     * @param string $uuid
+     * @return Task
+     */
+    public function getReference($uuid)
+    {
+        if (isset($this->tasks[$uuid])) {
+            return $this->tasks[$uuid];
+        }
+
+        $self    = $this;
+        $factory = new LazyLoadingValueHolderFactory();
+
+        $initializer = function (
+            & $wrappedObject,
+            LazyLoadingInterface $proxy,
+            $method,
+            array $parameters,
+            & $initializer
+        ) use ($self, $uuid) {
+
+            $initializer   = null;
+            $wrappedObject = $this->export($uuid)[0];
+
+            return true;
+        };
+
+        $task = $factory->createProxy('DavidBadura\Taskwarrior\Task', $initializer);
+
+        return $this->tasks[$uuid] = $task;
+    }
+
     /**
      * @param Task $task
      */
@@ -302,7 +340,17 @@ class TaskManager
     {
         $json = $this->taskwarrior->export($filter);
 
-        return $this->getSerializer()->deserialize($json, 'array<DavidBadura\Taskwarrior\Task>', 'json');
+        $tasks = $this->getSerializer()->deserialize($json, 'array<DavidBadura\Taskwarrior\Task>', 'json');
+
+        foreach ($tasks as $task) {
+            if ($task->getDependencies()) {
+                continue;
+            }
+
+            $task->setDependencies(array());
+        }
+
+        return $tasks;
     }
 
     /**
@@ -338,6 +386,16 @@ class TaskManager
             $params['recur'] = $task->getRecurring()->getValue();
         }
 
+        $params['depends'] = [];
+
+        foreach ($task->getDependencies() as $depend) {
+            if (!$depend->getUuid()) {
+                throw new ReferenceException("you can't save a task that has dependencies to tasks that have not been saved");
+            }
+
+            $params['depends'][] = $depend->getUuid();
+        }
+
         $this->taskwarrior->modify($params, $task->getUuid());
     }
 
@@ -419,6 +477,7 @@ class TaskManager
             ->configureHandlers(function (HandlerRegistryInterface $registry) {
                 $registry->registerSubscribingHandler(new CarbonHandler());
                 $registry->registerSubscribingHandler(new RecurringHandler());
+                $registry->registerSubscribingHandler(new DependsHandler($this));
             })
             ->addDefaultHandlers()
             ->setSerializationVisitor('json', $visitor)
@@ -433,4 +492,4 @@ class TaskManager
     {
         return new self(new Taskwarrior());
     }
-}
\ No newline at end of file
+}
diff --git a/src/Taskwarrior.php b/src/Taskwarrior.php
index 0de5b32..d8ae36b 100644
--- a/src/Taskwarrior.php
+++ b/src/Taskwarrior.php
@@ -309,6 +309,14 @@ class Taskwarrior
             }
         }
 
+        if (array_key_exists('depends', $params)) {
+            if (is_array($params['depends'])) {
+                $options[] = 'depends:' . implode(',', $params['depends']);
+            } else {
+                $options[] = 'depends:' . $params['depends'];
+            }
+        }
+
         if (array_key_exists('status', $params)) {
             $options[] = 'status:' . $params['status'];
         }
diff --git a/tests/TaskManagerTest.php b/tests/TaskManagerTest.php
index 740770a..6955328 100644
--- a/tests/TaskManagerTest.php
+++ b/tests/TaskManagerTest.php
@@ -787,6 +787,59 @@ class TaskManagerTest extends \PHPUnit_Framework_TestCase
         $this->assertCount(1, $this->taskManager->filterPending('(status:pending or status:waiting)'));
     }
 
+    public function testDependenciesException()
+    {
+        $this->setExpectedException('DavidBadura\Taskwarrior\Exception\ReferenceException');
+
+        $task1 = new Task();
+        $task1->setDescription("a");
+
+        $task2 = new Task();
+        $task2->setDescription("b");
+
+        $task3 = new Task();
+        $task3->setDescription("c");
+
+        $task1->addDependency($task2);
+        $task1->addDependency($task3);
+
+        $this->taskManager->save($task1);
+    }
+
+
+    public function testDependencies()
+    {
+        $task1 = new Task();
+        $task1->setDescription("a");
+
+        $task2 = new Task();
+        $task2->setDescription("b");
+
+        $task1->addDependency($task2);
+
+        $this->taskManager->save($task2);
+        $this->taskManager->save($task1);
+
+        $this->taskManager->clear();
+        $temp1 = $this->taskManager->find($task1->getUuid());
+
+        $this->assertCount(1, $temp1->getDependencies());
+
+        $temp2 = $temp1->getDependencies()[0];
+
+        $this->assertInstanceOf('DavidBadura\Taskwarrior\Task', $temp2);
+        $this->assertEquals('b', $temp2->getDescription());
+
+        $temp1->removeDependency($temp2);
+
+        $this->taskManager->save($temp1);
+
+        $this->taskManager->clear();
+        $temp1 = $this->taskManager->find($task1->getUuid());
+
+        $this->assertCount(0, $temp1->getDependencies());
+    }
+
     /**
      * @param string $string
      * @return \DateTime
@@ -795,4 +848,4 @@ class TaskManagerTest extends \PHPUnit_Framework_TestCase
     {
         return new \Carbon\Carbon($string);
     }
-}
\ No newline at end of file
+}