diff --git a/src/adapters/api-gateway-v2.ts b/src/adapters/api-gateway-v2.ts
index 8401886..57a9748 100644
--- a/src/adapters/api-gateway-v2.ts
+++ b/src/adapters/api-gateway-v2.ts
@@ -54,16 +54,8 @@ function createRemixHeaders(
 async function sendRemixResponse(
   nodeResponse: Response
 ): Promise<APIGatewayProxyStructuredResultV2> {
-  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())) {
-    if (key.toLowerCase() === 'set-cookie') {
-      for (const value of values) {
-        cookies.push(value)
-      }
-    }
-  }
+  const cookies = nodeResponse.headers.getSetCookie()
 
   if (cookies.length) {
     nodeResponse.headers.delete('Set-Cookie')
diff --git a/tsconfig.json b/tsconfig.json
index 3998f55..84de09b 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -3,8 +3,9 @@
   "display": "Default",
   "compilerOptions": {
     "lib": [
-      "ES2022",
-      "DOM.Iterable"
+      "DOM",
+      "DOM.Iterable",
+      "ES2022"
     ],
     "module": "commonjs",
     "target": "ES2022",