diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2dd2731..98e2bad 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,7 @@
 ## 1.21.0 - August 6, 2024
 
 - Canada, Financial Institution number - allow 3 digits
+- modulus_checker failures will now return validation method specific error message
 
 ## 1.20.0 - October 13, 2023