diff --git a/ChangeLog.md b/ChangeLog.md
index b9e5634..946db3d 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -3,7 +3,7 @@
 This document describes notable changes. For details, see the [source code
 repository history](https://github.com/ddclient/ddclient/commits/main).
 
-## v4.0.0-alpha (unreleased work-in-progress)
+## 2024-12-25 v4.0.0-rc.1
 
 ### Breaking changes
 
diff --git a/ddclient.in b/ddclient.in
index 0474b56..cb980f0 100755
--- a/ddclient.in
+++ b/ddclient.in
@@ -78,7 +78,7 @@ use Sys::Hostname;
 #
 # For consistency and to match user expectations, the release part of the version is always three
 # components: MAJOR.MINOR.PATCH.
-use version 0.77; our $VERSION = version->declare('v4.0.0.0_0');
+use version 0.77; our $VERSION = version->declare('v4.0.0.0_901');
 
 sub parse_version {
     my ($v) = @_;