diff --git a/composer.json b/composer.json
index c5a6cbbd..e392d1e6 100644
--- a/composer.json
+++ b/composer.json
@@ -12,7 +12,8 @@
     },
     "require-dev": {
         "phpunit/phpunit": "^4.8",
-        "league/plates": "^3.1"
+        "league/plates": "^3.1",
+        "zendframework/zend-diactoros": "^1.0"
     },
     "repositories": [
         {