diff --git a/composer.json b/composer.json
index 7fd0d08..62986bb 100644
--- a/composer.json
+++ b/composer.json
@@ -22,7 +22,7 @@
         "vlucas/phpdotenv": "^3.4@dev",
         "middlewares/whoops": "dev-master",
         "ralouphie/getallheaders": "dev-master",
-        "guzzlehttp/guzzle": "^6.3@dev",
+        "guzzlehttp/guzzle": "^7@dev",
         "swiftmailer/swiftmailer": "^6.2@dev",
         "mcnd/storage": "dev-master",
         "mcnd/lean": "dev-master",