diff --git a/src/Model/Domain/ClickTracking.php b/src/Model/Domain/ClickTracking.php
index aa31e81..6101604 100644
--- a/src/Model/Domain/ClickTracking.php
+++ b/src/Model/Domain/ClickTracking.php
@@ -23,7 +23,7 @@ final class ClickTracking
     public static function create(array $data): self
     {
         $model = new self();
-        $model->active = !!($data['active'] ?? null);
+        $model->active = (bool) ($data['active'] ?? null);
 
         return $model;
     }
@@ -32,9 +32,6 @@ final class ClickTracking
     {
     }
 
-    /**
-     * @return bool
-     */
     public function isActive(): bool
     {
         return $this->active;
diff --git a/src/Model/Domain/OpenTracking.php b/src/Model/Domain/OpenTracking.php
index 54e5dfb..a99febd 100644
--- a/src/Model/Domain/OpenTracking.php
+++ b/src/Model/Domain/OpenTracking.php
@@ -23,7 +23,7 @@ final class OpenTracking
     public static function create(array $data): self
     {
         $model = new self();
-        $model->active = !!($data['active'] ?? null);
+        $model->active = (bool) ($data['active'] ?? null);
 
         return $model;
     }
@@ -32,9 +32,6 @@ final class OpenTracking
     {
     }
 
-    /**
-     * @return bool
-     */
     public function isActive(): bool
     {
         return $this->active;
diff --git a/src/Model/Domain/TrackingResponse.php b/src/Model/Domain/TrackingResponse.php
index ebb13e2..0f68805 100644
--- a/src/Model/Domain/TrackingResponse.php
+++ b/src/Model/Domain/TrackingResponse.php
@@ -42,25 +42,16 @@ final class TrackingResponse implements ApiResponse
     {
     }
 
-    /**
-     * @return ClickTracking
-     */
     public function getClick(): ClickTracking
     {
         return $this->click;
     }
 
-    /**
-     * @return OpenTracking
-     */
     public function getOpen(): OpenTracking
     {
         return $this->open;
     }
 
-    /**
-     * @return UnsubscribeTracking
-     */
     public function getUnsubscribe(): UnsubscribeTracking
     {
         return $this->unsubscribe;
diff --git a/src/Model/Domain/UnsubscribeTracking.php b/src/Model/Domain/UnsubscribeTracking.php
index 8974976..e6c5d63 100644
--- a/src/Model/Domain/UnsubscribeTracking.php
+++ b/src/Model/Domain/UnsubscribeTracking.php
@@ -25,7 +25,7 @@ final class UnsubscribeTracking
     public static function create(array $data): self
     {
         $model = new self();
-        $model->active = !!($data['active'] ?? null);
+        $model->active = (bool) ($data['active'] ?? null);
         $model->htmlFooter = $data['html_footer'] ?? '';
         $model->textFooter = $data['text_footer'] ?? '';
 
@@ -36,25 +36,16 @@ final class UnsubscribeTracking
     {
     }
 
-    /**
-     * @return bool
-     */
     public function isActive(): bool
     {
         return $this->active;
     }
 
-    /**
-     * @return string
-     */
     public function getHtmlFooter(): string
     {
         return $this->htmlFooter;
     }
 
-    /**
-     * @return string
-     */
     public function getTextFooter(): string
     {
         return $this->textFooter;
diff --git a/src/Model/Domain/UpdateClickTrackingResponse.php b/src/Model/Domain/UpdateClickTrackingResponse.php
index 0c085d6..e209df6 100644
--- a/src/Model/Domain/UpdateClickTrackingResponse.php
+++ b/src/Model/Domain/UpdateClickTrackingResponse.php
@@ -34,17 +34,11 @@ final class UpdateClickTrackingResponse implements ApiResponse
     {
     }
 
-    /**
-     * @return string|null
-     */
     public function getMessage(): ?string
     {
         return $this->message;
     }
 
-    /**
-     * @return ClickTracking
-     */
     public function getClick(): ClickTracking
     {
         return $this->click;
diff --git a/src/Model/Domain/UpdateOpenTrackingResponse.php b/src/Model/Domain/UpdateOpenTrackingResponse.php
index b62cf29..7ad0ae0 100644
--- a/src/Model/Domain/UpdateOpenTrackingResponse.php
+++ b/src/Model/Domain/UpdateOpenTrackingResponse.php
@@ -34,17 +34,11 @@ final class UpdateOpenTrackingResponse implements ApiResponse
     {
     }
 
-    /**
-     * @return string|null
-     */
     public function getMessage(): ?string
     {
         return $this->message;
     }
 
-    /**
-     * @return OpenTracking
-     */
     public function getOpen(): OpenTracking
     {
         return $this->open;
diff --git a/src/Model/Domain/UpdateUnsubscribeTrackingResponse.php b/src/Model/Domain/UpdateUnsubscribeTrackingResponse.php
index dc1623e..d6928ba 100644
--- a/src/Model/Domain/UpdateUnsubscribeTrackingResponse.php
+++ b/src/Model/Domain/UpdateUnsubscribeTrackingResponse.php
@@ -34,17 +34,11 @@ final class UpdateUnsubscribeTrackingResponse implements ApiResponse
     {
     }
 
-    /**
-     * @return string|null
-     */
     public function getMessage(): ?string
     {
         return $this->message;
     }
 
-    /**
-     * @return UnsubscribeTracking
-     */
     public function getUnsubscribe(): UnsubscribeTracking
     {
         return $this->unsubscribe;