Problem with a higher version than referenced assembly 'RhinoCommon' for Grasshopper

Problem with PlanktonGh in Visual Studio (Grasshopper Component)
In my view, it is because the RhinoCommon is older; however, I still could not find the RhinoCommon new version.

Please help me with this problem.

In some function like “.ToPlankTonMesh()” or “.ToRhinoMesh()”, It said that

"Assembly ‘‘PlanktonGh’ Version 0.4.2.0, Culture = neutral, PublicKeyToken = null’ uses ‘RhinoCommon’, version = 5.1.30000.16, Culture =neutral, PublicKeyToken=552281e97c755530’ which has a higher version than referenced assembly ‘RhinoCommon’ with identify ‘RhinoCommon’ , Version=5.1.30000.13, Culture=neutral, PublicToken=552281e97c755530’ "

I have try to download RhinoCommon SDK and installed it. Still nothing change.

Link: https://www.rhino3d.com/download/rhino/5.0/RhinoCommonSdk

   public MeshGrowthSystem(Mesh startingMesh)
    {
        ptMesh = startingMesh.ToPlanktonMesh();
    }

    public Mesh GetRhinoMesh()
    {
        return ptMesh.ToRhinoMesh();
    }

I expect to find the way to cope with this problem. (Something like the way to update RhinoCommon version)