diff --git a/O2DESNet/O2DESNet.csproj b/O2DESNet/O2DESNet.csproj
index 3b0651c..ce28e88 100644
--- a/O2DESNet/O2DESNet.csproj
+++ b/O2DESNet/O2DESNet.csproj
@@ -9,18 +9,18 @@
     <Authors>Li Haobin</Authors>
     <Description>A framework for Object-Oriented Discrete Event Simulation</Description>
     <Company>ISEM Department, National University of Singapore</Company>
-    <Copyright>Copyright © 2015-2019 O²DES.NET</Copyright>
+    <Copyright>Copyright © 2015-2026 O²DES.NET</Copyright>
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
     <PackageProjectUrl>http://www.o2des.net</PackageProjectUrl>
     <PackageIconUrl>http://www.o2des.net/wp-content/uploads/2016/10/o2des.png</PackageIconUrl>
     <RepositoryUrl>https://github.com/li-haobin/O2DES.Net</RepositoryUrl>
     <RepositoryType>git</RepositoryType>
     <PackageTags>O2DES.Net Discrete-Event Simulation</PackageTags>
+	<PackageVersion>3.7.2</PackageVersion>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="MathNet.Numerics" Version="4.8.1" />
-    <PackageReference Include="System.Drawing.Common" Version="4.5.1" />
+    <PackageReference Include="MathNet.Numerics" Version="5.0.0" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/README.md b/README.md
index 534dc8f..3ef0612 100644
--- a/README.md
+++ b/README.md
@@ -19,6 +19,9 @@ It is developed and used by C#, which facilitates flexible integration with the
 
 # Change Log
 
+## Version 3.7.2
+- Remove unnecessary package.
+
 ## Version 3.6
 - Improvement of HourCounter to synchronize with simulator ClockTime
 https://github.com/li-haobin/O2DESNet/issues/1