diff --git a/composer.json b/composer.json
index 51fdab0..f1354e6 100644
--- a/composer.json
+++ b/composer.json
@@ -27,7 +27,9 @@
   ],
   "require": {
     "php":                          ">=7.1",
-    "guzzlehttp/guzzle":            "~6.0|~7.0",
+    "guzzlehttp/guzzle":            "^6.5.8|^7.4.5",
+    "guzzlehttp/promises":          "^1.5.3|^2.0",
+    "guzzlehttp/psr7":              "^1.9.1|^2.5",
     "symfony/framework-bundle":     "~4.0|~5.0|~6.0",
     "symfony/expression-language":  "~4.0|~5.0|~6.0",
     "symfony/stopwatch":            "~4.0|~5.0|~6.0",
diff --git a/src/Middleware/EventDispatchMiddleware.php b/src/Middleware/EventDispatchMiddleware.php
index 033f00c..4fbe87a 100644
--- a/src/Middleware/EventDispatchMiddleware.php
+++ b/src/Middleware/EventDispatchMiddleware.php
@@ -82,7 +82,7 @@ function (Exception $reason) {
                         $this->doDispatch($postTransactionEvent, GuzzleEvents::postTransactionFor($this->serviceName));
 
                         // Continue down the chain.
-                        return \GuzzleHttp\Promise\rejection_for($reason);
+                        return \GuzzleHttp\Promise\Create::rejectionFor($reason);
                     }
                 );
             };
diff --git a/src/Middleware/LogMiddleware.php b/src/Middleware/LogMiddleware.php
index 78cfebe..968a7e5 100644
--- a/src/Middleware/LogMiddleware.php
+++ b/src/Middleware/LogMiddleware.php
@@ -66,7 +66,7 @@ function ($reason) use ($logger, $request, $formatter, $requestId) {
 
                         $logger->notice($message, $context);
 
-                        return \GuzzleHttp\Promise\rejection_for($reason);
+                        return \GuzzleHttp\Promise\Create::rejectionFor($reason);
                     }
                 );
             };
diff --git a/src/Middleware/ProfileMiddleware.php b/src/Middleware/ProfileMiddleware.php
index bd9ec89..63ceeae 100644
--- a/src/Middleware/ProfileMiddleware.php
+++ b/src/Middleware/ProfileMiddleware.php
@@ -50,7 +50,7 @@ function ($response) use ($event) {
                     function ($reason) use ($event) {
                         $event->stop();
 
-                        return \GuzzleHttp\Promise\rejection_for($reason);
+                        return \GuzzleHttp\Promise\Create::rejectionFor($reason);
                     }
                 );
             };
diff --git a/src/Middleware/SymfonyLogMiddleware.php b/src/Middleware/SymfonyLogMiddleware.php
index 3c60e38..0dbc7b0 100644
--- a/src/Middleware/SymfonyLogMiddleware.php
+++ b/src/Middleware/SymfonyLogMiddleware.php
@@ -52,7 +52,7 @@ function ($reason) use ($logger, $request, $formatter) {
 
                     $logger->notice($message);
 
-                    return \GuzzleHttp\Promise\rejection_for($reason);
+                    return \GuzzleHttp\Promise\Create::rejectionFor($reason);
                 }
             );
         };