.NET Core Version 1.1.x supported?

Hi, 
I would like to use this buildpack for .NET Core Version 1.1 but it doesn't work. In the log (heroku logs), it said that Microsoft .Net Core 1.1 not found.

Does this buildpack support only .NET Core Version 1.0? Can I somehow to make it work with other version (for example 1.0.1 or 1.1.0)?
Thank you.