diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6fe791f5a2ae1857cdbb787e094edd7e4807c70e..a263cc1fc107337980d8d61bd7d5d985626cc82d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,7 @@ that users understand how the changes affect the new version.
 
 version 2.2.0-dev
 ---------------------------
++ The statsPrefix input for umitools dedup is norw optional.
 + Allow setting the `--emit-ref-confidence` flag for HaplotypeCaller.
 + Add `--output-mode` flag to HaplotypeCaller.
 + Added rtg.Format and rtg.VcfEval tasks.