diff --git a/composer.json b/composer.json
index 637a66ab..6299cd08 100644
--- a/composer.json
+++ b/composer.json
@@ -34,7 +34,8 @@
         "theorchard/monolog-cascade": "^0.4",
         "endroid/qrcode": "^1.7",
         "mikehaertl/phpwkhtmltopdf": "^2.2",
-        "doctrine/migrations": "^1.4"
+        "doctrine/migrations": "^1.4",
+        "http-interop/http-middleware": "^0.4"
     },
     "require-dev": {
         "phpunit/phpunit": "^5.7 || ^6.0",