diff --git a/CHANGELOG.md b/CHANGELOG.md
index a76cb5b..2537871 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 ## [5.1.1]
+### Fixed
+- fix: treat undefined/null as [] in deserialize ([#166](https://github.com/MetaMask/eth-simple-keyring/pull/166))
 
 ## [5.1.0]
 ### Changed