diff --git a/composer.json b/composer.json
index d1c56b9..7860dca 100644
--- a/composer.json
+++ b/composer.json
@@ -18,7 +18,7 @@
     "require": {
         "php": "^5.6 || ^7.0",
         "psr/http-message": "^1.0",
-        "guzzlehttp/guzzle": "^6.0",
+        "guzzlehttp/guzzle": "^7.0",
         "laminas/laminas-diactoros": "^2.0",
         "relay/relay": "^1.0",
         "laminas/laminas-httphandlerrunner": "^1.1"