diff --git a/composer.json b/composer.json
index 1ec5626..696e374 100644
--- a/composer.json
+++ b/composer.json
@@ -17,7 +17,7 @@
     }
   },
   "require": {
-    "guzzlehttp/guzzle": "^6.3.3",
+    "guzzlehttp/guzzle": "^7.0.0",
     "netresearch/jsonmapper": "^1.4"
   },
   "require-dev": {