go version command shows old version number after update to 1.8

Question

Pretty much the title. I downloaded/installed Go 1.8 for OS X, but when I go

$ go version
go version go1.7.5 darwin/amd64

My .bashrc look like

Answer 1

In my case, I had to replace binary files manually after re-installation.

cp /usr/local/go/bin/* /usr/local/bin/