rails 打不上 gem 无力 求助力

ERROR: Could not find a valid gem 'rails' (>= 0), here is why:
Unable to download data from https://rubygems.org/ - Errno::ECONNRESET
: An existing connection was forcibly closed by the remote host. - SSL_connect (
https://api.rubygems.org/latest_specs.4.8.gz)
win7平台
怎么弄呀 .gz包 下载不了