diff --git a/CHANGELOG.md b/CHANGELOG.md
index c9ee3909..7c01ede1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -20,6 +20,13 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
  * `PyToken` was removed due to unsoundness (See [#94](https://github.com/PyO3/pyo3/issues/94)).
  * Removed the unnecessary type parameter from `PyObjectAlloc`
 
+## [0.5.1] - 2018-11-24
+
+### Fixed
+
+ * Fix undeterministic segfaults when creating many objects by kngwyu in [#281](https://github.com/PyO3/pyo3/pull/281)
+
+
 ## [0.5.0] - 2018-11-11
 
 ### Added