diff --git a/app/steps/decorateUserResHeaders.js b/app/steps/decorateUserResHeaders.js
index 0e9d323e..a810cab8 100644
--- a/app/steps/decorateUserResHeaders.js
+++ b/app/steps/decorateUserResHeaders.js
@@ -10,7 +10,7 @@ function decorateUserResHeaders(container) {
   }
 
   const clearAllHeaders = (res) => {
-    for (const header in res._headers) {
+    for (const header in res.getHeaders ? res.getHeaders() : res._headers) {
       res.removeHeader(header)
     }
   }