diff --git a/CHANGELOG.md b/CHANGELOG.md
index 95070483..2dab8975 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,7 +8,7 @@ The following changes have been implemented but not released yet:
 
 ## [1.3.1] - 2023-09-15
 
-- Transitive dependency updates.
+- Build system (bundler and TypeScript) updates. This should be transparent to dependants.
 
 ## [1.3.0] - 2023-05-09