diff --git a/Gemfile b/Gemfile
index c5a7514..f3ca387 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,4 +1,5 @@
 #source 'http://rubygems.org'
+source 'https://mirrors.tuna.tsinghua.edu.cn/rubygems/'
 
 gem 'rails',                   '4.2.11'