diff --git a/CHANGELOG.md b/CHANGELOG.md
index 080d271..80f684b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,7 +6,14 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 
 ## [Unreleased]
-[Unreleased]: https://github.com/althonos/pyfamsa/compare/v0.3.0...HEAD
+[Unreleased]: https://github.com/althonos/pyfamsa/compare/v0.3.1...HEAD
+
+
+## [v0.3.1] - 2023-01-14
+[v0.3.1]: https://github.com/althonos/pyfamsa/compare/v0.3.0...v0.3.1
+
+### Fixed
+- Disable use of memory-monotonic allocations to fix multithreading errors ([#1](https://github.com/althonos/pyfamsa/issues/1)).
 
 
 ## [v0.3.0] - 2023-07-21
diff --git a/pyfamsa/_version.py b/pyfamsa/_version.py
index 493f741..260c070 100644
--- a/pyfamsa/_version.py
+++ b/pyfamsa/_version.py
@@ -1 +1 @@
-__version__ = "0.3.0"
+__version__ = "0.3.1"