diff --git a/composer.json b/composer.json
index db30c38..a37e45e 100644
--- a/composer.json
+++ b/composer.json
@@ -22,7 +22,7 @@
     },
     "require": {
         "php": ">=5.5.0",
-        "guzzlehttp/guzzle": "~6.0",
+        "guzzlehttp/guzzle": "~5.0|~6.0",
         "illuminate/support": "~5.0"
     },
     "require-dev": {