diff --git a/composer.json b/composer.json
index 3c069fd..5fb1245 100644
--- a/composer.json
+++ b/composer.json
@@ -13,7 +13,7 @@
         "ext-curl": "*",
         "ext-json": "*",
         "ext-mbstring": "*",
-        "guzzlehttp/guzzle": "^6.2"
+        "guzzlehttp/guzzle": "^6.2|^7.0"
     },
     "autoload": {
         "psr-4": { "DocPlanner\\Client\\" : "lib/" }