diff --git a/README.md b/README.md
index 2d978788..9aa93606 100644
--- a/README.md
+++ b/README.md
@@ -42,7 +42,12 @@ To update the composer modules:
 
     % composer update
     % phar-install
+    
+## Versioning 
 
+Use the [semantic versioning](https://semver.org/) standard. 
+
+The version should be updated in `style.css`, and the appropriate commit tagged as `vX.Y.Z`.
 
 ## This theme uses
 
diff --git a/style.css b/style.css
index 566d17f4..1c55d218 100644
--- a/style.css
+++ b/style.css
@@ -5,7 +5,7 @@
  * Description: This is the beta theme in use for the blogs hosted at blog.gov.uk.
  * License: GNU General Public License v2.0
  * License URI: http://www.gnu.org/licenses/gpl-2.0.html
- * Version: 0.1
+ * Version: 1.0.0
  *
  * GOV.UK Blogs theme, Copyright (c) 2013 HM Government (Government Digital Service)
  * This theme is distributed under the terms of the GNU GPL, version 2.