diff --git a/Models/Task.php b/Models/Task.php
index 2933670..0c22049 100644
--- a/Models/Task.php
+++ b/Models/Task.php
@@ -388,7 +388,7 @@ class Task implements \JsonSerializable
      *
      * @since  1.0.0
      */
-    public function setDescriptionRaw(string $description)
+    public function setDescriptionRaw(string $description) : void
     {
         $this->descriptionRaw = $description;
     }
@@ -614,7 +614,7 @@ class Task implements \JsonSerializable
      *
      * @since  1.0.0
      */
-    public function setType(int $type = TaskType::SINGLE)
+    public function setType(int $type = TaskType::SINGLE) : void
     {
         $this->type = $type;
     }
diff --git a/Models/TaskElement.php b/Models/TaskElement.php
index 745725d..3f9ede6 100644
--- a/Models/TaskElement.php
+++ b/Models/TaskElement.php
@@ -156,7 +156,7 @@ class TaskElement implements \JsonSerializable
      *
      * @since  1.0.0
      */
-    public function setCreatedBy($creator)
+    public function setCreatedBy($creator) : void
     {
         $this->createdBy = $creator;
 
@@ -391,7 +391,7 @@ class TaskElement implements \JsonSerializable
      *
      * @since  1.0.0
      */
-    public function setTask(int $task)
+    public function setTask(int $task) : void
     {
         $this->task = $task;
     }