diff --git a/packages/http/src/http.js b/packages/http/src/http.js
index 4be6ede..9867b32 100644
--- a/packages/http/src/http.js
+++ b/packages/http/src/http.js
@@ -68,7 +68,9 @@ export const createHttpServer = async (latus) => {
       res.statusCode = proxyRes.statusCode;
       if ('text/html; charset=UTF-8' === proxyRes.headers['content-type']) {
         requestMiddleware(req, res, () => {
-          res.setHeader('Content-Type', proxyRes.headers['content-type']);
+          if (!res.headersSent) {
+            res.setHeader('Content-Type', proxyRes.headers['content-type']);
+          }
           proxyRes.pipe(res);
         });
       }