diff --git a/CHANGELOG.md b/CHANGELOG.md
index a2e1069..2ee5fc9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,7 +2,8 @@
 
 ## 21.1.0-r1 (2021/02/13)
 
-* Move back to s6-overlay 2.1.0.2 (#164)
+* Downgrade to `s6-overlay` 2.1.0.2 (#164)
+* No need to specify `rrdtool_version` (#166)
 
 ## 21.1.0-r0 (2021/02/02)