diff --git a/composer.json b/composer.json
index 7be6538..462ccca 100644
--- a/composer.json
+++ b/composer.json
@@ -28,7 +28,7 @@
         "ext-curl": "*",
         "ext-json": "*",
         "ext-mbstring": "*",
-        "guzzlehttp/guzzle": "^6.2 || ^7.0",
+        "guzzlehttp/guzzle": "^6.2 || ^7.0 || ^8.0",
         "guzzlehttp/psr7": "^1.8.2"
     },
     "require-dev": {