Ruby gems更换source的时候 certificate verify failed

安装Ruby后，安装sass，jekkly会遇到错误，按照 https://gems.ruby-china.org/ ,的方式更换Ruby源，会遇到错误

gem sources –add https://gems.ruby-china.org/ –remove https://rubygems.org/
Error fetching https://ruby.taobao.org/:
SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed (https://rubygems-china.oss-cn-hangzhou.aliyuncs.com/specs.4.8.gz)

其实 gem sources --add http://gems.ruby-china.org/ 是 http。 就可以了。坑啊- -。