diff --git a/CHANGELOG.md b/CHANGELOG.md
index 862717349e..c671e00873 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,7 +7,7 @@
   useful summary for people upgrading their application, not a replication
   of the commit log.
 
-## Unreleased
+## 40.0.0
 
 * **BREAKING:** Upgrade to govuk frontend 5.1 ([PR #4041](https://github.com/alphagov/govuk_publishing_components/pull/4041))
 
diff --git a/Gemfile.lock b/Gemfile.lock
index d63ae56edc..8cc4a91a27 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    govuk_publishing_components (39.2.5)
+    govuk_publishing_components (40.0.0)
       govuk_app_config
       govuk_personalisation (>= 0.7.0)
       kramdown
diff --git a/lib/govuk_publishing_components/version.rb b/lib/govuk_publishing_components/version.rb
index 79d0d5c1ed..b806020a00 100644
--- a/lib/govuk_publishing_components/version.rb
+++ b/lib/govuk_publishing_components/version.rb
@@ -1,3 +1,3 @@
 module GovukPublishingComponents
-  VERSION = "39.2.5".freeze
+  VERSION = "40.0.0".freeze
 end