diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7e262a1..f36f66b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,8 +2,12 @@
 
 ## [Unreleased]
 
+## [0.5.1] - 2023-12-02
+### Changed
+- fix: guard against deleted parent and child #42
+
 ## [0.5.0] - 2023-02-14
-## Added
+### Added
 - refactor to use root level subscriptions #37
 
 ## [0.4.1] - 2023-01-29
diff --git a/package.json b/package.json
index 7431ad6..070d566 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "valtio-yjs",
   "description": "valtio-yjs makes yjs state easy",
-  "version": "0.5.0",
+  "version": "0.5.1",
   "author": "Daishi Kato",
   "repository": {
     "type": "git",