diff --git a/CHANGELOG.md b/CHANGELOG.md
index bc87b07..a9a37d0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## 2024-02-16
+### Added
+- Updated default [`version`](https://github.com/overleaf/toolkit/blob/master/lib/config-seed/version) to `4.2.3`.
+
+  :warning: This is a security release. Please check the [release notes](https://github.com/overleaf/overleaf/wiki/Release-Notes--4.x.x#server-pro-423) for details.
+
 ## 2024-02-14
 ### Added
 - Updated default [`version`](https://github.com/overleaf/toolkit/blob/master/lib/config-seed/version) to `4.2.2`.
diff --git a/lib/config-seed/version b/lib/config-seed/version
index af8c8ec..f2c6cb6 100644
--- a/lib/config-seed/version
+++ b/lib/config-seed/version
@@ -1 +1 @@
-4.2.2
+4.2.3