diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5efe6421..7e13d4c3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,4 @@
-# 4.17.1
+# 4.18.0
 
 - Add GOVUK.ShowHideContent JavaScript to support showing and hiding content, toggled by radio buttons and checkboxes ([PR #315](https://github.com/alphagov/govuk_frontend_toolkit/pull/315)).
 
diff --git a/VERSION.txt b/VERSION.txt
index 1b0a87fd..b30c4dcb 100644
--- a/VERSION.txt
+++ b/VERSION.txt
@@ -1 +1 @@
-4.17.1
+4.18.0