diff --git a/composer.json b/composer.json
index 176f1d7..3e5a8f8 100755
--- a/composer.json
+++ b/composer.json
@@ -22,7 +22,7 @@
         "ext-curl": "*",
         "ext-json": "*",
         "ext-mbstring": "*",
-        "guzzlehttp/guzzle": "^7.4.0"
+        "guzzlehttp/guzzle": "^6.5||^7.4.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^4.8",