diff --git a/composer.json b/composer.json
index be3de55..785f741 100644
--- a/composer.json
+++ b/composer.json
@@ -11,7 +11,7 @@
     ],
     "require": {
         "php": "^7.2|^8.0",
-        "guzzlehttp/guzzle": "~7.0",
+        "guzzlehttp/guzzle": "^7.8",
         "guzzlehttp/uri-template": "0.2.0"
     },
 	"require-dev": {
diff --git a/src/Http/HapiClient.php b/src/Http/HapiClient.php
index bc9746e..d071d93 100644
--- a/src/Http/HapiClient.php
+++ b/src/Http/HapiClient.php
@@ -200,9 +200,9 @@ public function refresh($resource)
      * Instantiates the HttpRequest depending on the
      * configuration from the given Request.
      * @param $request	RequestInterface	The Request configuration.
-     * @return	The HTTP request.
+     * @return    \GuzzleHttp\Psr7\Request HTTP request.
      */
-    private function createHttpRequest(RequestInterface $request)
+    private function createHttpRequest(RequestInterface $request): \GuzzleHttp\Psr7\Request
     {
         // Handle authentication first
         if ($this->authenticationMethod) {
@@ -241,7 +241,7 @@ private function createHttpRequest(RequestInterface $request)
             $request->getMethod(),
             $url,
             array_merge($headers, $headersToAdd),
-            $body ? \GuzzleHttp\Psr7\stream_for($body) : null
+            $body ? \GuzzleHttp\Psr7\Utils::streamFor($body) : null
         );
 
         return $httpRequest;