diff --git a/api/router.js b/api/router.js
index 96cf56f89..fdf4ed8a3 100644
--- a/api/router.js
+++ b/api/router.js
@@ -6,7 +6,6 @@ var m = require("../render/hyperscript")
 var buildPathname = require("../pathname/build")
 var parsePathname = require("../pathname/parse")
 var compileTemplate = require("../pathname/compileTemplate")
-var assign = require("../util/assign")
 var censor = require("../util/censor")
 
 var sentinel = {}
@@ -78,7 +77,7 @@ module.exports = function($window, mountRedraw) {
 			.slice(route.prefix.length)
 		var data = parsePathname(path)
 
-		assign(data.params, $window.history.state)
+		Object.assign(data.params, $window.history.state)
 
 		function reject(e) {
 			console.error(e)
diff --git a/pathname/build.js b/pathname/build.js
index 848e3841d..3cd033c3e 100644
--- a/pathname/build.js
+++ b/pathname/build.js
@@ -1,7 +1,6 @@
 "use strict"
 
 var buildQueryString = require("../querystring/build")
-var assign = require("../util/assign")
 
 // Returns `path` from `template` + `params`
 module.exports = function(template, params) {
@@ -16,7 +15,7 @@ module.exports = function(template, params) {
 	var path = template.slice(0, pathEnd)
 	var query = {}
 
-	assign(query, params)
+	Object.assign(query, params)
 
 	var resolved = path.replace(/:([^\/\.-]+)(\.{3})?/g, function(m, key, variadic) {
 		delete query[key]
diff --git a/render/hyperscript.js b/render/hyperscript.js
index a40004131..8b34233e9 100644
--- a/render/hyperscript.js
+++ b/render/hyperscript.js
@@ -3,7 +3,6 @@
 var Vnode = require("../render/vnode")
 var hyperscriptVnode = require("./hyperscriptVnode")
 var hasOwn = require("../util/hasOwn")
-var assign = require("../util/assign")
 
 var selectorParser = /(?:(^|#|\.)([^#\.\[\]]+))|(\[(.+?)(?:\s*=\s*("|'|)((?:\\["'\]]|.)*?)\5)?\])/g
 var selectorCache = Object.create(null)
@@ -40,7 +39,7 @@ function execSelector(state, vnode) {
 	vnode.tag = state.tag
 
 	if (state.attrs != null) {
-		attrs = assign({}, state.attrs, attrs)
+		attrs = Object.assign({}, state.attrs, attrs)
 
 		if (className != null || state.attrs.className != null) attrs.className =
 			className != null
@@ -60,7 +59,7 @@ function execSelector(state, vnode) {
 	// The DOM does things to inputs based on the "type", so it needs set first.
 	// See: https://github.com/MithrilJS/mithril.js/issues/2622
 	if (state.tag === "input" && hasOwn.call(attrs, "type")) {
-		attrs = assign({type: attrs.type}, attrs)
+		attrs = Object.assign({type: attrs.type}, attrs)
 	}
 
 	vnode.attrs = attrs
diff --git a/util/assign.js b/util/assign.js
deleted file mode 100644
index 38a421f3f..000000000
--- a/util/assign.js
+++ /dev/null
@@ -1,4 +0,0 @@
-// This exists so I'm only saving it once.
-"use strict"
-
-module.exports = Object.assign