diff --git a/composer.json b/composer.json
index d3dcd52..96c968e 100644
--- a/composer.json
+++ b/composer.json
@@ -16,9 +16,15 @@
     "config": {
         "sort-packages": true
     },
+    "extra": {
+        "dependency": [
+            "http-interop/http-middleware"
+        ]
+    },
     "require": {
         "php": "^5.6 || ^7.0",
-        "http-interop/http-middleware": "^0.1.1 || ^0.2 || ^0.3 || ^0.4.1 || ^0.5"
+        "http-interop/http-middleware": "^0.1.1 || ^0.2 || ^0.3 || ^0.4.1 || ^0.5",
+        "webimpress/composer-extra-dependency": "^0.1"
     },
     "require-dev": {
         "phpunit/phpunit": "^5.7.22 || ^6.3.1"