diff --git a/api/src/Controller/HttpConflictRequestException.php b/api/src/Controller/HttpConflictRequestException.php
index f37fa77..816fe2e 100644
--- a/api/src/Controller/HttpConflictRequestException.php
+++ b/api/src/Controller/HttpConflictRequestException.php
@@ -1,4 +1,4 @@
-<?php
+<?php /** @noinspection PhpMissingFieldTypeInspection */
 
 namespace TorstenHettstedt\TimekeepingApi\Controller;
 
diff --git a/api/src/Middleware/ErrorHandler.php b/api/src/Middleware/ErrorHandler.php
index 709ab8a..9693206 100644
--- a/api/src/Middleware/ErrorHandler.php
+++ b/api/src/Middleware/ErrorHandler.php
@@ -1,9 +1,10 @@
-<?php
+<?php /** @noinspection PhpUndefinedClassInspection */
 
 
 namespace TorstenHettstedt\TimekeepingApi\Middleware;
 
 
+use JetBrains\PhpStorm\ArrayShape;
 use Psr\Http\Message\ResponseInterface;
 use Psr\Http\Message\ServerRequestInterface;
 use Psr\Log\LoggerInterface;
@@ -30,7 +31,13 @@ class ErrorHandler
      *
      * @return mixed[]
      */
-    protected function buildJsonArray(Throwable $exception): array
+    #[ArrayShape([
+        'timestamp' => "false|string",
+        'status'    => "int",
+        "error"     => "string",
+        'message'   => "string",
+        'path'      => "string"
+    ])] protected function buildJsonArray(Throwable $exception): array
     {
         $payload = [
             'timestamp' => date('Y-m-d\TH:m:sP'),