diff --git a/composer.json b/composer.json
index 0e7ad10..99bc1d0 100644
--- a/composer.json
+++ b/composer.json
@@ -13,7 +13,7 @@
         }
     ],
     "require": {
-        "guzzlehttp/guzzle": "~6.0"
+        "guzzlehttp/guzzle": "^6.5.8|^7.4.5"
     },
     "require-dev": {