diff --git a/Enyim.Caching.Tests/Enyim.Caching.Tests.csproj b/Enyim.Caching.Tests/Enyim.Caching.Tests.csproj
index e8fd04a5..5e1f93de 100644
--- a/Enyim.Caching.Tests/Enyim.Caching.Tests.csproj
+++ b/Enyim.Caching.Tests/Enyim.Caching.Tests.csproj
@@ -1,15 +1,15 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.0</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
     <IsPackable>false</IsPackable>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="3.0.0" />
-    <PackageReference Include="Microsoft.Extensions.Logging" Version="3.0.0" />
-    <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="3.0.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.3.0" />
+    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="5.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Logging" Version="5.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="5.0.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.8.0" />
     <PackageReference Include="xunit" Version="2.4.1" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.1">
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>
diff --git a/Enyim.Caching/Enyim.Caching.csproj b/Enyim.Caching/Enyim.Caching.csproj
index 352d6b83..ec299fc2 100755
--- a/Enyim.Caching/Enyim.Caching.csproj
+++ b/Enyim.Caching/Enyim.Caching.csproj
@@ -3,7 +3,7 @@
   <PropertyGroup>
     <Description>EnyimMemcachedCore is a Memcached client library for .NET Core. Usage: Add services.AddEnyimMemcached(...) and app.UseEnyimMemcached() in Startup. Add IMemcachedClient into constructor.</Description>
     <Authors>cnblogs.com</Authors>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFrameworks>netstandard2.1;net5.0</TargetFrameworks>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <AssemblyName>EnyimMemcachedCore</AssemblyName>
     <PackageId>EnyimMemcachedCore</PackageId>
@@ -16,13 +16,13 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Extensions.Configuration.Abstractions" Version="3.0.0" />
-    <PackageReference Include="Microsoft.Extensions.Options.ConfigurationExtensions" Version="3.0.0" />
-    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="3.0.0" />
-    <PackageReference Include="Microsoft.Extensions.Options" Version="3.0.0" />
-    <PackageReference Include="Microsoft.Extensions.Caching.Abstractions" Version="3.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.Abstractions" Version="5.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Options.ConfigurationExtensions" Version="5.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="5.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Options" Version="5.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Caching.Abstractions" Version="5.0.0" />
     <PackageReference Include="Microsoft.AspNetCore.Http.Abstractions" Version="2.2.0" />
     <PackageReference Include="Newtonsoft.Json.Bson" Version="1.0.2" />
-    <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.3" />
+    <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.4" />
   </ItemGroup>
 </Project>
diff --git a/Enyim.StressTest/Enyim.StressTest.csproj b/Enyim.StressTest/Enyim.StressTest.csproj
index 26a610ad..656f2fcf 100644
--- a/Enyim.StressTest/Enyim.StressTest.csproj
+++ b/Enyim.StressTest/Enyim.StressTest.csproj
@@ -2,8 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp3.0</TargetFramework>
-    <LangVersion>latest</LangVersion>
+    <TargetFramework>net5.0</TargetFramework>
   </PropertyGroup>
 
   <ItemGroup>
@@ -18,10 +17,10 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="3.0.0" />
-    <PackageReference Include="Microsoft.Extensions.Hosting" Version="3.0.0" />
-    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="3.0.0" />
-    <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="3.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="5.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Hosting" Version="5.0.0" />
+    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="5.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="5.0.0" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\Enyim.Caching\Enyim.Caching.csproj" />
diff --git a/MemcachedTest/MemcachedTest.csproj b/MemcachedTest/MemcachedTest.csproj
index e8fd04a5..5e1f93de 100755
--- a/MemcachedTest/MemcachedTest.csproj
+++ b/MemcachedTest/MemcachedTest.csproj
@@ -1,15 +1,15 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.0</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
     <IsPackable>false</IsPackable>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="3.0.0" />
-    <PackageReference Include="Microsoft.Extensions.Logging" Version="3.0.0" />
-    <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="3.0.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.3.0" />
+    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="5.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Logging" Version="5.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="5.0.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.8.0" />
     <PackageReference Include="xunit" Version="2.4.1" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.1">
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>
diff --git a/SampleWebApp.IntegrationTests/SampleWebApp.IntegrationTests.csproj b/SampleWebApp.IntegrationTests/SampleWebApp.IntegrationTests.csproj
index 38b7a082..aaf3375c 100644
--- a/SampleWebApp.IntegrationTests/SampleWebApp.IntegrationTests.csproj
+++ b/SampleWebApp.IntegrationTests/SampleWebApp.IntegrationTests.csproj
@@ -1,15 +1,15 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.0</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
     <IsPackable>false</IsPackable>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="3.0.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.3.0" />
+    <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="5.0.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.8.0" />
     <PackageReference Include="xunit" Version="2.4.1" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.1">
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>
diff --git a/SampleWebApp/SampleWebApp.csproj b/SampleWebApp/SampleWebApp.csproj
index 31917339..9d7cddbf 100644
--- a/SampleWebApp/SampleWebApp.csproj
+++ b/SampleWebApp/SampleWebApp.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.0</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
     <RootNamespace>Enyim.Caching.SampleWebApp</RootNamespace>
     <AssemblyName>Enyim.Caching.SampleWebApp</AssemblyName>
   </PropertyGroup>