diff --git a/lib/tasks/update_account_info.rake b/lib/tasks/update_account_info.rake
new file mode 100644
index 0000000..f4a8e3a
--- /dev/null
+++ b/lib/tasks/update_account_info.rake
@@ -0,0 +1,30 @@
+require "#{Rails.root}/config/environment"
+
+desc 'Update account info with github.com'
+task :update_account_info do
+  User.all.each do |user|
+    puts "Fetch user info about \033[36m%s\033[39m..." % user.username
+    begin
+      user_info = user.github_client.user
+    rescue => e
+      # TODO Notify error to admin
+      $stderr.puts ["#{e.class} #{e.message}:", *e.backtrace.map {|m| '  '+m }].join("\n")
+      next
+    end
+
+    {
+      username: user_info['login'],
+      name: user_info['name'],
+      avatar_url: user_info['avatar_url']
+    }.each {|attribute, value| user.send("#{attribute}=", value) }
+
+    if user.changed?
+      change_detail = user.changes.map {|attribute, (before, after)| '%s: %s -> %s' % [attribute, before, after] }.join(', ')
+      puts "User \033[36m%s\033[39m changed (%s)." % [user.username, change_detail]
+    else
+      puts "User \033[36m%s\033[39m not changed." % [user.username]
+    end
+
+    user.save!
+  end
+end