diff --git a/app/Exceptions/Handler.php b/app/Exceptions/Handler.php
index cc939df..d92c320 100755
--- a/app/Exceptions/Handler.php
+++ b/app/Exceptions/Handler.php
@@ -12,6 +12,7 @@ use Illuminate\Http\Response;
 use Illuminate\Validation\ValidationException;
 use Laravel\Lumen\Exceptions\Handler as ExceptionHandler;
 use League\OAuth2\Server\Exception\OAuthServerException;
+use Symfony\Component\HttpFoundation\Response as ResponseAlias;
 use Symfony\Component\HttpKernel\Exception\HttpException;
 use Throwable;
 
@@ -70,7 +71,7 @@ class Handler extends ExceptionHandler
             $model = strtolower(class_basename($exception->getModel()));
 
             return $this->errorResponse(trans('errors.model_not_found',['model'=>$model]),
-                Response::HTTP_NOT_FOUND);
+                ResponseAlias::HTTP_NOT_FOUND);
         }
 
         if($exception instanceof AuthorizationException)
@@ -82,7 +83,7 @@ class Handler extends ExceptionHandler
         {
             $errors = $exception->validator->errors()->getMessages();
 
-            return $this->errorResponse($errors, Response::HTTP_UNPROCESSABLE_ENTITY);
+            return $this->errorResponse($errors, ResponseAlias::HTTP_UNPROCESSABLE_ENTITY);
         }
 
         if ( $exception instanceof ClientException)
@@ -99,20 +100,20 @@ class Handler extends ExceptionHandler
 
         if($exception instanceof AuthenticationException)
         {
-            return  $this->errorResponse($exception->getMessage(),Response::HTTP_UNAUTHORIZED);
+            return  $this->errorResponse($exception->getMessage(), ResponseAlias::HTTP_UNAUTHORIZED);
         }
 
         if ($exception instanceof OAuthServerException)
         {
-            return $this->errorResponse($exception->getMessage(),Response::HTTP_INTERNAL_SERVER_ERROR);
+            return $this->errorResponse($exception->getMessage(), ResponseAlias::HTTP_INTERNAL_SERVER_ERROR);
         }
 
         if ($exception instanceof ServerException)
         {
             $errorBody = $exception->getResponse()->getBody()->getContents();
             $error = json_decode($errorBody);
-            $message = $error ? $error->error : $exception->getMessage();
-            $code = $error ? $error->status : Response::HTTP_INTERNAL_SERVER_ERROR;
+            $message = $error?->error ?? $exception->getMessage();
+            $code =  $error?->status ?? ResponseAlias::HTTP_INTERNAL_SERVER_ERROR;
             return $this->errorResponse($message,$code);
         }