diff --git a/src/Spryng/SpryngRestApi/Http/HttpClient.php b/src/Spryng/SpryngRestApi/Http/HttpClient.php
index c7d2b87..cdea02c 100644
--- a/src/Spryng/SpryngRestApi/Http/HttpClient.php
+++ b/src/Spryng/SpryngRestApi/Http/HttpClient.php
@@ -24,7 +24,7 @@ class HttpClient implements HttpClientInterface
      */
     protected $lastResponse;
 
-    public function __construct(Request $req = null)
+    public function __construct(Request|null $req = null)
     {
         $this->ch = curl_init();
 
@@ -34,7 +34,7 @@ public function __construct(Request $req = null)
         }
     }
 
-    public function send(Request $req = null)
+    public function send(Request|null $req = null)
     {
         if ($req === null) {
             if ($this->activeRequest === null) {
@@ -99,7 +99,7 @@ private function executeWithData()
      * @param Request $req
      * @return HttpClientInterface
      */
-    public function setActiveRequest(Request $req)
+    public function setActiveRequest(Request|null $req)
     {
         $this->activeRequest = $req;
 
diff --git a/src/Spryng/SpryngRestApi/Http/HttpClientInterface.php b/src/Spryng/SpryngRestApi/Http/HttpClientInterface.php
index 6944672..58df264 100644
--- a/src/Spryng/SpryngRestApi/Http/HttpClientInterface.php
+++ b/src/Spryng/SpryngRestApi/Http/HttpClientInterface.php
@@ -13,18 +13,18 @@ public function __construct(Request $req = null);
     /**
      * Executes the currently active request or $req if it is set.
      *
-     * @param Request $req
+     * @param Request|null $req
      * @return Response
      */
-    public function send(Request $req = null);
+    public function send(Request|null $req = null);
 
     /**
      * Sets the current request to be activated to $req
      *
-     * @param Request $req
+     * @param Request|null $req
      * @return HttpClientInterface
      */
-    public function setActiveRequest(Request $req);
+    public function setActiveRequest(Request|null $req);
 
     /**
      * Returns the lastResponse of the last request that was send.