Install-Package : Unable to connect to the remote server At line:1 char:1

• Install-Package Microsoft.EntityFrameworkCore.SqlServer -Version 1.1
• ~
  • CategoryInfo : NotSpecified: (:) [Install-Package], WebException
  • FullyQualifiedErrorId : NuGetCmdletUnhandledException,NuGet.PowerShell.Commands.InstallPackageCommand

Estou usando o Visual Studio Professional 2013, esse erro tem a ver com algum tipo de incompatibilidade dessa versão?