diff --git a/src/JT809.Protocol/JT809.Protocol.csproj b/src/JT809.Protocol/JT809.Protocol.csproj
index f59742d..2a44a68 100644
--- a/src/JT809.Protocol/JT809.Protocol.csproj
+++ b/src/JT809.Protocol/JT809.Protocol.csproj
@@ -14,7 +14,7 @@
     <PackageProjectUrl>https://github.com/SmallChi/JT809</PackageProjectUrl>
     <license>https://github.com/SmallChi/JT809/blob/master/LICENSE</license>
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
-    <Version>2.1.5</Version>
+    <Version>2.1.6</Version>
     <PackageLicenseFile>LICENSE</PackageLicenseFile>
   </PropertyGroup>
 
@@ -104,16 +104,16 @@
 
   <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard2.0' ">
     <PackageReference Include="Microsoft.CSharp" Version="4.6.0" />
-    <PackageReference Include="System.Buffers" Version="4.5.0" />
+    <PackageReference Include="System.Buffers" Version="4.5.1" />
     <PackageReference Include="System.Dynamic.Runtime" Version="4.3.0" />
-    <PackageReference Include="System.Memory" Version="4.5.3" />
+    <PackageReference Include="System.Memory" Version="4.5.4" />
     <PackageReference Include="System.Reflection.Extensions" Version="4.3.0" />
   </ItemGroup>
 
   <ItemGroup>
     <PackageReference Include="Microsoft.CSharp" Version="4.7.0" />
     <PackageReference Include="System.Text.Encoding.CodePages" Version="4.7.0" />
-    <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="3.1.2" />
+    <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="3.1.3" />
   </ItemGroup>