diff --git a/composer.json b/composer.json
index 358f77b..14373bc 100644
--- a/composer.json
+++ b/composer.json
@@ -38,7 +38,7 @@
   },
   "require-dev": {
     "adriansuter/php-autoload-override": "^1.2",
-    "laminas/laminas-diactoros": "^2.3",
+    "laminas/laminas-diactoros": "^2.4",
     "nyholm/psr7": "^1.3",
     "php-http/psr7-integration-tests": "dev-master",
     "phpstan/phpstan": "^0.12.52",