diff --git a/src/adapters/api-gateway-v2.ts b/src/adapters/api-gateway-v2.ts
index 8401886..767ed6c 100644
--- a/src/adapters/api-gateway-v2.ts
+++ b/src/adapters/api-gateway-v2.ts
@@ -57,7 +57,7 @@ async function sendRemixResponse(
   const cookies: string[] = []
 
   // AWS API Gateway will send back set-cookies outside of response headers.
-  for (const [key, values] of Object.entries(nodeResponse.headers.raw())) {
+  for (const [key, values] of nodeResponse.headers.entries()) {
     if (key.toLowerCase() === 'set-cookie') {
       for (const value of values) {
         cookies.push(value)