diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0792afc3..667ef661 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,8 @@
 # Changelog
 
 ## [Unreleased]
+
+## [5.1.21]
 ### Added
 - `rp.launch.uuid.print` and `rp.launch.uuid.print.output` configuration parameters, by @HardNorth
 ### Changed