diff --git a/Gemfile.lock b/Gemfile.lock
index 43252793e..58f069ac1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -122,6 +122,7 @@ GEM
     htmlentities (4.3.2)
     i18n (0.6.1)
     ice_nine (0.11.0)
+    iconv (1.0.4)
     journey (1.0.4)
     jquery-rails (2.0.3)
       railties (>= 3.1.0, < 5.0)
@@ -171,6 +172,8 @@ GEM
       win32console (~> 1.3)
     pry-nav (0.2.3)
       pry (~> 0.9.10)
+    puma (2.10.1)
+      rack (>= 1.1, < 2.0)
     rack (1.4.5)
     rack-accept (0.4.5)
       rack (>= 0.4)
@@ -219,6 +222,7 @@ GEM
       sass-rails
     rmagick (2.13.2)
     ruby-openid (2.1.8)
+    ruby-prof (0.15.2)
     rubyzip (1.1.6)
     sass (3.3.10)
     sass-rails (3.2.6)
@@ -269,6 +273,8 @@ GEM
     win32console (1.3.2-x86-mingw32)
     xpath (2.0.0)
       nokogiri (~> 1.3)
+    zip-zip (0.3)
+      rubyzip (>= 1.0.0)
 
 PLATFORMS
   ruby
@@ -291,6 +297,7 @@ DEPENDENCIES
   guard-test (~> 1.0.0)
   htmlentities
   i18n (~> 0.6.0)
+  iconv
   jquery-rails (~> 2.0.2)
   kaminari
   mocha (~> 1.1.0)
@@ -300,12 +307,15 @@ DEPENDENCIES
   paperclip (~> 3.5.4)
   pry
   pry-nav
+  puma
   rack-mini-profiler!
   rack-openid
   rails (= 3.2.13)
   rich (= 1.4.6)
   rmagick (>= 2.0.0)
   ruby-openid (~> 2.1.4)
+  ruby-prof (~> 0.15.1)
+  rubyzip
   sass-rails (~> 3.2.3)
   seems_rateable!
   selenium-webdriver (~> 2.42.0)
@@ -313,3 +323,4 @@ DEPENDENCIES
   spork-testunit (~> 0.0.8)
   therubyracer
   uglifier (>= 1.0.3)
+  zip-zip
diff --git a/app/api/mobile/apis/users.rb b/app/api/mobile/apis/users.rb
index 33ea075a7..c9ecdd84f 100644
--- a/app/api/mobile/apis/users.rb
+++ b/app/api/mobile/apis/users.rb
@@ -9,15 +9,17 @@ module Mobile
       desc "add a user"
       params do
         requires :login, type: String, desc: 'username'
-        requires :email, type: String, desc: 'email'
+        requires :mail, type: String, desc: 'mail'
         requires :password, type: String, desc: 'password'
       end
       post do
-        user_service = UsersService.new
+        us = UsersService.new
         begin
-          user = user_service.register(params)
+          user = us.register params.merge(:password_confirmation => params[:password],
+                                          :should_confirmation_password => true)
+          raise "register failed." if user.new_record?
           {status: 0, data: user}
-        rescue Exception => e
+        rescue => e
           {status: 1, message: e.message}
         end
       end