I refernced a version 11 DLL file in my workflow script activity.

However workflow is trying to load version 10.4.5

I only have a version 11 DLL referenced, how would it possibly find a 10.4.5 version of a DLL that is not even in my list of references? I do not want to use version 10 of anything for this project, there are known issues with 10 like not being able to load assemblies as seen in the error.