diff --git a/lib/serve.js b/lib/serve.js
index f39ea2af..f678a9f2 100644
--- a/lib/serve.js
+++ b/lib/serve.js
@@ -36,6 +36,10 @@ function createCallback(response) {
     for (const key in lambdaResponse.headers) {
       response.setHeader(key, lambdaResponse.headers[key]);
     }
+    for (const key in lambdaResponse.multiValueHeaders) {
+      const items = lambdaResponse.multiValueHeaders[key];
+      response.setHeader(key, items);
+    }
 
     if (lambdaResponse.body) {
       response.write(