diff --git a/composer.json b/composer.json
index 1c2c360..c106211 100644
--- a/composer.json
+++ b/composer.json
@@ -42,7 +42,7 @@
     },
     "require-dev": {
         "adriansuter/php-autoload-override": "^1.3",
-        "laminas/laminas-diactoros": "^2.11",
+        "laminas/laminas-diactoros": "^2.14",
         "nyholm/psr7": "^1.5",
         "php-http/psr7-integration-tests": "dev-master",
         "phpstan/phpstan": "^1.8",