dep ensure failed

[waliguder]

C:\Users\PlanPoint\go\src\github.com\decred\dcraddrgen>dep ensure Solving failure: unable to deduce repository and source type for "golang.org/x/crypto": unable to read metadata: unable to fetch raw metadata: failed HTTP request to URL "http://golang.org/x/crypto?go-get=1": Get http://golang.org/x/crypto?go-get=1: dial tcp 216.239.37.1:80: connectex: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.