diff --git a/framework/core/composer.json b/framework/core/composer.json
index f2f68d608..1ba12df12 100644
--- a/framework/core/composer.json
+++ b/framework/core/composer.json
@@ -57,7 +57,7 @@
         "symfony/translation": "^3.3",
         "symfony/yaml": "^3.3",
         "tobscure/json-api": "^0.3.0",
-        "zendframework/zend-diactoros": "^1.7",
+        "zendframework/zend-diactoros": "^1.8.4",
         "zendframework/zend-stratigility": "^3.0"
     },
     "require-dev": {