diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6bbbb36..091ef15 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,7 @@ Changelog
 9.0.0
 ------
 
-- Normalize aggregate DMARC report volumes when a report timespan exceeds 27 hours
+- Normalize aggregate DMARC report volumes when a report timespan exceeds 24 hours
 
 8.19.1
 ------