diff --git a/src/index.mjs b/src/index.mjs
index 954399e..7a0bfe3 100644
--- a/src/index.mjs
+++ b/src/index.mjs
@@ -19,10 +19,10 @@ export default (a, options = {}, link = url.parse(a), body = "") => new Promise(
   if(options.method === "POST") {
     body = typeof options.body === "object" ? querystring.stringify(options.body) : options.body;
     delete options.body;
-    options.headers = {...options.headers, ...{
+    options.headers = {...{
       "Content-Type":   "application/x-www-form-urlencoded",
       "Content-Length": Buffer.byteLength(body)
-    }};
+    }, ...options.headers};
   }
   (link.protocol === "https:"?https:http).request(options, res => resolve({
     body:    res,