diff --git a/CHANGELOG.md b/CHANGELOG.md
index db329a6..e2ec666 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,4 @@
-## 4.0.0.pre (prerelease):
+## 4.0.0 (20/05/2024):
 
 - BREAKING CHANGE: Remove support for end-of-life Ruby verisons and Rails versions prior to 6.0.0
 - Bug fix: Fix issue with breadcrumbs not being sent to Raygun when `send_in_background` is enabled (thanks to @jjb for the bug report)
diff --git a/lib/raygun/version.rb b/lib/raygun/version.rb
index cbc744c..88bec28 100644
--- a/lib/raygun/version.rb
+++ b/lib/raygun/version.rb
@@ -1,3 +1,3 @@
 module Raygun
-  VERSION = "4.0.0.pre"
+  VERSION = "4.0.0"
 end