diff --git a/CHANGELOG.md b/CHANGELOG.md
index 256cb4f57..ae20379c7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,13 @@
 Changelog
 =========
 
+## TBD
+
+### Enhancements
+
+* Support strings and regular expressions in `Configuration#ignore_classes`
+  | [#597](https://github.com/bugsnag/bugsnag-ruby/pull/597)
+
 ## 6.13.1 (11 May 2020)
 
 ### Fixes