diff --git a/CHANGELOG.md b/CHANGELOG.md
index e4a911f..df1ca3a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,9 +9,16 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 
+## [5.1.2] - 2023-05-06
+
+### Fixed
+- `Null safety: Cannot pass nullable value to not-nullable argument` with Haxe 4.3.x
+
+
 ## [5.1.1] - 2023-04-02
 
-- fixed `Unknown identifier : _pollPeriod`
+### Fixed
+- `Unknown identifier : _pollPeriod`
 
 
 ## [5.1.0] - 2023-04-02
diff --git a/haxelib.json b/haxelib.json
index 43abae5..94198f5 100644
--- a/haxelib.json
+++ b/haxelib.json
@@ -11,6 +11,6 @@
    "description": "A haxelib with cross-platform concurrency functions and classes (thread-pool, task executor/scheduler, re-entrant lock, semaphore, atomic int/bool, thread-safe collections/queues)",
    "contributors": ["vegardit"],
    "releasenote": "See https://github.com/vegardit/haxe-concurrent/blob/main/CHANGELOG.md",
-   "version": "5.1.1",
+   "version": "5.1.2",
    "dependencies": { }
 }