After upgraded servicestack i get assembly error

i just upgraded servicestack nuget packages and now get this error.
Any clue how to solve this?

Could not load file or assembly ‘System.Runtime.CompilerServices.Unsafe, Version=, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a’ or one of its dependencies. The located assembly’s manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

You’ll need a binding request to forward it to the version you do have see Resolving Runtime Assembly Loading Issues.