diff --git a/composer.json b/composer.json
index 6cb8a46..adaec2b 100644
--- a/composer.json
+++ b/composer.json
@@ -17,7 +17,7 @@
     ],
     "require": {
         "php": ">=7.3.0",
-        "guzzlehttp/guzzle": "~6.2",
+        "guzzlehttp/guzzle": "~6.5.5",
         "guzzlehttp/oauth-subscriber": "0.3.*"
     },
     "require-dev": {