diff --git a/CHANGELOG.md b/CHANGELOG.md
index ea94086..dcfe03e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,8 @@
 # Changelog
 
+- Rename `Stoplight::Light::DEFAULT_THRESHOLD` to
+  `Stoplight::DEFAULT_THRESHOLD`.
+
 ## v0.1.0 (2014-08-12)
 
 - Initial release.