diff --git a/README.md b/README.md
index d96eb04b..30e9ab21 100644
--- a/README.md
+++ b/README.md
@@ -18,7 +18,7 @@ mithril.js [![NPM Version](https://img.shields.io/npm/v/mithril.svg)](https://ww
 
 ## What is Mithril?
 
-A modern client-side Javascript framework for building Single Page Applications. It's small (<!-- size -->8.33 KB<!-- /size --> gzipped), fast and provides routing and XHR utilities out of the box.
+A modern client-side Javascript framework for building Single Page Applications. It's small (<!-- size -->8.32 KB<!-- /size --> gzipped), fast and provides routing and XHR utilities out of the box.
 
 Mithril is used by companies like Vimeo and Nike, and open source platforms like Lichess 👍.
 
diff --git a/mithril.js b/mithril.js
index 03d2224e..42d5cbb4 100644
--- a/mithril.js
+++ b/mithril.js
@@ -991,7 +991,8 @@ var coreRenderer = function($window) {
 		updateNodes(dom, dom.vnodes, Vnode.normalizeChildren(vnodes), false, hooks, null, namespace === "http://www.w3.org/1999/xhtml" ? undefined : namespace)
 		dom.vnodes = vnodes
 		for (var i = 0; i < hooks.length; i++) hooks[i]()
-		if ($doc.activeElement !== active) active.focus()
+		// document.activeElement can return null in IE https://developer.mozilla.org/en-US/docs/Web/API/Document/activeElement
+		if (active != null && $doc.activeElement !== active) active.focus()
 	}
 	return {render: render, setEventCallback: setEventCallback}
 }
diff --git a/mithril.min.js b/mithril.min.js
index 9b3d144a..0f005532 100644
--- a/mithril.min.js
+++ b/mithril.min.js
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