diff --git a/CHANGELOG.md b/CHANGELOG.md
index b4146ec..e8ffbdb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+2.4.0 / 2014-02-24
+==================
+
+ * Update Style Guide Boilerplate to use box-sizing border-box globally
+
 2.3.0 / 2013-08-24
 ==================
 
diff --git a/README.md b/README.md
index eef1a19..7f6491f 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-Style-Guide-Boilerplate v2.3.0
+Style-Guide-Boilerplate v2.4.0
 ==============================
 
 A starting point for crafting living style guides.
diff --git a/css/sg-style.css b/css/sg-style.css
index 3dbac73..bc7b2c7 100644
--- a/css/sg-style.css
+++ b/css/sg-style.css
@@ -10,9 +10,11 @@
 /* -------------------------------------------------------------------------
  Layout
 ---------------------------------------------------------------------------- */
-* {
-  -moz-box-sizing: border-box;
-  box-sizing: border-box;
+/* http:/paulirish.com/2012/box-sizing-border-box-ftw/ */
+*, *:before, *:after {
+  -webkit-box-sizing: border-box;
+     -moz-box-sizing: border-box; 
+          box-sizing: border-box;
 }
 
 body {margin: 0;}