diff --git a/HISTORY.md b/HISTORY.md
index 56531ea2..90ae9f78 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -3,6 +3,7 @@
 ### New Features
 
  * Implement an event bus (moved from Cucumber-Ruby) ([#106](https://github.com/cucumber/cucumber-ruby-core/pull/106) @mattwynne)
+ * Use frozen string literals ([#105](https://github.com/cucumber/cucumber-ruby-core/pull/105) @twalpole)
 
 ### Bugfixes