diff --git a/src/Bundle/ChillTaskBundle/Timeline/SingleTaskTaskLifeCycleEventTimelineProvider.php b/src/Bundle/ChillTaskBundle/Timeline/SingleTaskTaskLifeCycleEventTimelineProvider.php
index 3ee3b1129..a07a8c9e3 100644
--- a/src/Bundle/ChillTaskBundle/Timeline/SingleTaskTaskLifeCycleEventTimelineProvider.php
+++ b/src/Bundle/ChillTaskBundle/Timeline/SingleTaskTaskLifeCycleEventTimelineProvider.php
@@ -17,7 +17,7 @@ use Chill\TaskBundle\Entity\SingleTask;
 use Chill\TaskBundle\Entity\Task\SingleTaskPlaceEvent;
 use Doctrine\ORM\EntityManagerInterface;
 use Symfony\Component\Workflow\Registry;
-use Symfony\Component\Workflow\Workflow;
+use Symfony\Component\Workflow\WorkflowInterface;
 
 /**
  * Provide timeline elements related to tasks, in tasks context.
@@ -108,12 +108,7 @@ class SingleTaskTaskLifeCycleEventTimelineProvider implements TimelineProviderIn
         return self::TYPE === $type;
     }
 
-    /**
-     * @param string $name
-     *
-     * @return \Symfony\Component\Workflow\Transition
-     */
-    protected function getTransitionByName($name, Workflow $workflow)
+    protected function getTransitionByName(string $name, WorkflowInterface $workflow)
     {
         foreach ($workflow->getDefinition()->getTransitions() as $transition) {
             if ($transition->getName() === $name) {
diff --git a/src/Bundle/ChillTaskBundle/Timeline/TaskLifeCycleEventTimelineProvider.php b/src/Bundle/ChillTaskBundle/Timeline/TaskLifeCycleEventTimelineProvider.php
index ee1fa3a82..221a2056e 100644
--- a/src/Bundle/ChillTaskBundle/Timeline/TaskLifeCycleEventTimelineProvider.php
+++ b/src/Bundle/ChillTaskBundle/Timeline/TaskLifeCycleEventTimelineProvider.php
@@ -21,7 +21,7 @@ use Chill\TaskBundle\Entity\Task\SingleTaskPlaceEvent;
 use Doctrine\ORM\EntityManagerInterface;
 use Symfony\Bundle\SecurityBundle\Security;
 use Symfony\Component\Workflow\Registry;
-use Symfony\Component\Workflow\Workflow;
+use Symfony\Component\Workflow\WorkflowInterface;
 
 /**
  * Provide element for timeline for 'person' and 'center' context.
@@ -94,12 +94,7 @@ class TaskLifeCycleEventTimelineProvider implements TimelineProviderInterface
         return self::TYPE === $type;
     }
 
-    /**
-     * @param string $name
-     *
-     * @return \Symfony\Component\Workflow\Transition
-     */
-    protected function getTransitionByName($name, Workflow $workflow)
+    protected function getTransitionByName(string $name, WorkflowInterface $workflow)
     {
         foreach ($workflow->getDefinition()->getTransitions() as $transition) {
             if ($transition->getName() === $name) {