diff --git a/README.md b/README.md
index 913fdfe3..b6e99098 100644
--- a/README.md
+++ b/README.md
@@ -34,6 +34,6 @@ There are over 4000 assertions in the test suite, and tests cover even difficult
 
 ## Modularity
 
-Despite the huge improvements in performance and modularity, the new codebase is smaller than v0.2.x, currently clocking at <!-- size -->7.55 KB<!-- /size --> min+gzip
+Despite the huge improvements in performance and modularity, the new codebase is smaller than v0.2.x, currently clocking at <!-- size -->7.59 KB<!-- /size --> min+gzip
 
 In addition, Mithril is now completely modular: you can import only the modules that you need and easily integrate 3rd party modules if you wish to use a different library for routing, ajax, and even rendering
diff --git a/mithril.js b/mithril.js
index 074077db..55810181 100644
--- a/mithril.js
+++ b/mithril.js
@@ -232,7 +232,6 @@ var _8 = function($window, Promise) {
 		}
 		return args
 	}
-	
 	function request(args, extra) {
 		var finalize = finalizer()
 		args = normalize(args, extra)
@@ -255,6 +254,9 @@ var _8 = function($window, Promise) {
 				xhr.setRequestHeader("Accept", "application/json, text/*")
 			}
 			if (args.withCredentials) xhr.withCredentials = args.withCredentials
+			for (var key in args.headers) if ({}.hasOwnProperty.call(args.headers, key)) {
+				xhr.setRequestHeader(key, args.headers[key])
+			}
 			if (typeof args.config === "function") xhr = args.config(xhr, args) || xhr
 			xhr.onreadystatechange = function() {
 				if (xhr.readyState === 4) {
@@ -282,7 +284,6 @@ var _8 = function($window, Promise) {
 	function jsonp(args, extra) {
 		var finalize = finalizer()
 		args = normalize(args, extra)
-		
 		var promise0 = new Promise(function(resolve, reject) {
 			var callbackName = args.callbackName || "_mithril_" + Math.round(Math.random() * 1e16) + "_" + callbackCount++
 			var script = $window.document.createElement("script")
diff --git a/mithril.min.js b/mithril.min.js
index fe499750..ddf9415f 100644
--- a/mithril.min.js
+++ b/mithril.min.js
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