go get error: cannot use dialer

[nsamadi]

When I trying to install koko on ubuntu 16.04TLS I get the following error:

$ sudo go get github.com/redhat-nfvpe/koko

github.com/redhat-nfvpe/koko/api

go/src/github.com/redhat-nfvpe/koko/api/crio.go:31:112: cannot use dialer (type func("context".Context, string) (net.Conn, error)) as type func(string, time.Duration) (net.Conn, error) in argument to grpc.WithDialer

please take a look and help me..
thanks