Error installing AutoMapper in VS 2012

I am using Visual Studio 2012, NET Framework 4.6.1, when I try to install AutoMapper I get the following error.

PM> Install-Package AutoMapper 
Install-Package : 'AutoMapper' ya tiene una dependencia definida para 
'NETStandard.Library'.
En línea: 1 Carácter: 1
+ Install-Package AutoMapper
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Install-Package], InvalidOperationException
    + FullyQualifiedErrorId : NuGetCmdletUnhandledException,NuGet.PowerShell.Commands.InstallPackageCommand