diff --git a/composer.json b/composer.json
index 808da94a4..6c2468105 100644
--- a/composer.json
+++ b/composer.json
@@ -56,7 +56,7 @@
     "require-dev": {
         "ext-simplexml": "*",
         "adriansuter/php-autoload-override": "^1.2",
-        "guzzlehttp/psr7": "^1.7",
+        "guzzlehttp/psr7": "^1.8",
         "http-interop/http-factory-guzzle": "^1.0",
         "laminas/laminas-diactoros": "^2.4",
         "nyholm/psr7": "^1.4",