diff --git a/CHANGELOG.md b/CHANGELOG.md
index ac6a5c9..7164d11 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Changes to normalize.css
 
-### HEAD
+### 4.0.0 (March 19, 2016)
 
 * Add the correct font weight for `b` and `strong` in Chrome, Edge, and Safari.
 * Correct inconsistent `overflow` for `hr` in Edge and IE.
diff --git a/normalize.css b/normalize.css
index 0919059..b0d3f97 100644
--- a/normalize.css
+++ b/normalize.css
@@ -1,4 +1,4 @@
-/*! normalize.css v3.0.3 | MIT License | github.com/necolas/normalize.css */
+/*! normalize.css v4.0.0 | MIT License | github.com/necolas/normalize.css */
 
 /**
  * 1. Change the default font family in all browsers (opinionated).
diff --git a/package.json b/package.json
index e149265..7d798d2 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "normalize.css",
-  "version": "3.0.3",
+  "version": "4.0.0",
   "description": "A modern alternative to CSS resets",
   "style": "normalize.css",
   "files": [