diff --git a/src/server/http.js b/src/server/http.js
index 85f0c7a..59873ef 100644
--- a/src/server/http.js
+++ b/src/server/http.js
@@ -44,6 +44,7 @@ export async function createHttpServer() {
           res.end(await hydration(req, buffer));
         }
         else {
+          res.setHeader('Content-Type', proxyRes.headers['content-type']);
           res.end(buffer);
         }
       });