diff --git a/Changelog.md b/Changelog.md
index 4280ab2d0c..34d51def37 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,6 +1,11 @@
 ### Development
 [Full Changelog](http://github.com/rspec/rspec-core/compare/v3.9.2...master)
 
+Enhancements:
+
+* Memoize `RSpec::Core::Formatters::ExceptionPresenter#exception_lines` to improve performance
+  with slow exception messages. (Maxime Lapointe, #2743)
+
 Bug Fixes:
 
 * Declare `ruby2_keywords` on `method_missing` for other gems. (Jon Rowe, #2731)