diff --git a/server4/AspNetCoreWebServiceTest/AspNetCoreWebServiceTest.csproj b/server4/AspNetCoreWebServiceTest/AspNetCoreWebServiceTest.csproj
index cea7389..00fa479 100644
--- a/server4/AspNetCoreWebServiceTest/AspNetCoreWebServiceTest.csproj
+++ b/server4/AspNetCoreWebServiceTest/AspNetCoreWebServiceTest.csproj
@@ -12,7 +12,7 @@
     <PackageReference Include="xunit.runner.visualstudio" Version="2.3.1" />
     <DotNetCliToolReference Include="dotnet-xunit" Version="2.3.1" />
 
-    <PackageReference Include="Microsoft.AspNetCore.App" Version="2.1.4"/>
+    <PackageReference Include="Microsoft.AspNetCore.App" Version="2.1.22"/>
    </ItemGroup>
 
    <ItemGroup>