diff --git a/src/EventSubscriber/TaskLifecycleSubscriber.php b/src/EventSubscriber/TaskLifecycleSubscriber.php
index 75e7a22..b3eb79b 100644
--- a/src/EventSubscriber/TaskLifecycleSubscriber.php
+++ b/src/EventSubscriber/TaskLifecycleSubscriber.php
@@ -98,7 +98,7 @@ class TaskLifecycleSubscriber implements EventSubscriberInterface
         $task->setDoneBy($user);
 
         $task->setChangesetsResult(
-            json_encode($this->osmClient()->getChangesets(
+            json_encode($this->osmClient->getChangesets(
                 $user->getUsername(),
                 $task->getStartAt(),
                 $task->getFinishAt()