diff --git a/composer.json b/composer.json
index 3ed4770..551310c 100644
--- a/composer.json
+++ b/composer.json
@@ -24,6 +24,7 @@
   "require": {
     "php": "^7.3 || ^8.0",
     "guzzlehttp/guzzle": ">=6.2.0",
+    "guzzlehttp/psr7": ">=1.7.0",
     "ext-json": "*"
   },
   "suggest": {