diff --git a/ruby/gemrc b/ruby/gemrc
index d93b427..d5c2f1d 100644
--- a/ruby/gemrc
+++ b/ruby/gemrc
@@ -3,7 +3,9 @@
 :bulk_threshold: 1000
 :sources:
 - https://gems.ruby-china.com
+- https://rubygems.org/
 :update_sources: true
 :verbose: true
+:concurrent_downloads: 8
 benchmark: false
 gem: "--no-document"
diff --git a/zsh/functions.zsh b/zsh/functions.zsh
index b66fa01..1a17f2a 100644
--- a/zsh/functions.zsh
+++ b/zsh/functions.zsh
@@ -388,6 +388,8 @@ function gc {
     echo 'invalid option...'
   done
   emails=($GIT_EMAILS)
+  git config user.name $name
+  git config user.email $emails[$index]
   (git commit --verbose $*) || return
   (git commit --amend --author="$name <$emails[$index]>") || return
 }