Mesh collider does not change in blend shape

hi. I am experimenting with a blend shape, but changing the blend shape does not change the size of the mesh collider.
Does anyone know the means to change the size of the mesh collider when changing the blend shape? Thanks a lot guys

We have solved the problem.

We were able to update meshCollider by using SkinnedMeshRenderer.BakeMesh ().

    var render = GetComponent<SkinnedMeshRenderer>();

    Mesh bakeMesh = new Mesh();

    var collider = GetComponent<MeshCollider>();
    collider.sharedMesh = bakeMesh;