diff --git a/index.js b/index.js
index de86840..6d14765 100644
--- a/index.js
+++ b/index.js
@@ -280,7 +280,7 @@ Mod.prototype.callback = function (req, res, serverconsole, responseEnd, href, e
 
             try {
               res.writeHead(code, msg, bheaderso);
-              res.write(buffer.substr(headerendline + eol.length), "latin1");
+              res.write(Buffer.from(buffer.substr(headerendline + eol.length), "latin1"));
             } catch (ex) {
               interpreter.removeAllListeners("exit");
               interpreter.stdout.removeAllListeners("data");