diff --git a/CHANGELOG.md b/CHANGELOG.md
index cf89ff3..e6c3a06 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,7 +7,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 ## [Unreleased] - yyyy-mm-dd
 
 ### Added
-- Nothing
+- Added RcBinaryMinHeap ([@Sarofc](https://github.com/Sarofc))
+- Added DotRecast.Benchmark ([@Sarofc](https://github.com/Sarofc))
 
 ### Fixed
 - Fix raycast shortcuts ([@Sarofc](https://github.com/Sarofc)) [#72](https://github.com/ikpil/DotRecast/issues/72)
diff --git a/src/DotRecast.Core/Collections/RcBinaryMinHeap.cs b/src/DotRecast.Core/Collections/RcBinaryMinHeap.cs
index b7d9a48..900fd54 100644
--- a/src/DotRecast.Core/Collections/RcBinaryMinHeap.cs
+++ b/src/DotRecast.Core/Collections/RcBinaryMinHeap.cs
@@ -1,6 +1,5 @@
 using System;
 using System.Collections.Generic;
-using System.Linq;
 using System.Runtime.CompilerServices;
 
 namespace DotRecast.Core.Collections