diff --git a/src/TaskManager.php b/src/TaskManager.php
index df091b8..1c5e06c 100644
--- a/src/TaskManager.php
+++ b/src/TaskManager.php
@@ -24,10 +24,11 @@ use ProxyManager\Proxy\ValueHolderInterface;
 
 /**
  * @author David Badura <d.a.badura@gmail.com>
+ * @author Tobias Olry <tobias.olry@gmail.com>
  */
 class TaskManager
 {
-    const PATTERN = '/^[\wäüö]*$/i';
+    const PATTERN = '/^[\wäüö\.]*$/i';
 
     /**
      * @var Taskwarrior
diff --git a/tests/TaskManagerTest.php b/tests/TaskManagerTest.php
index c6e0fed..be5d351 100644
--- a/tests/TaskManagerTest.php
+++ b/tests/TaskManagerTest.php
@@ -9,7 +9,8 @@ use DavidBadura\Taskwarrior\Taskwarrior;
 use Symfony\Component\Filesystem\Filesystem;
 
 /**
- * @author David Badura <badura@simplethings.de>
+ * @author David Badura <d.a.badura@gmail.com>
+ * @author Tobias Olry <tobias.olry@gmail.com>
  */
 class TaskManagerTest extends \PHPUnit_Framework_TestCase
 {
@@ -548,7 +549,7 @@ class TaskManagerTest extends \PHPUnit_Framework_TestCase
         $this->assertEquals(array('später'), $task1->getTags());
         $this->assertEquals(array('später'), $this->taskwarrior->tags());
 
-        $this->assertCount(1,$this->taskManager->filterPending('+später'));
+        $this->assertCount(1, $this->taskManager->filterPending('+später'));
     }
 
     public function testTagNameNotAllowed()
@@ -563,6 +564,21 @@ class TaskManagerTest extends \PHPUnit_Framework_TestCase
         $this->taskManager->save($task1);
     }
 
+    public function testProjectHierarchyAllowed()
+    {
+        $projects = ['grandparent.parent.child', 'parent.child'];
+        foreach ($projects as $project) {
+            $task = new Task();
+            $task->setDescription('foo1');
+            $task->setProject($project);
+
+            // now exception thrown
+            $this->taskManager->save($task);
+
+            $this->assertEquals($project, $task->getProject());
+        }
+    }
+
     public function testWait()
     {
         $task1 = new Task();