diff --git a/Rakefile b/Rakefile
index ae388e82..e7afa057 100644
--- a/Rakefile
+++ b/Rakefile
@@ -28,3 +28,9 @@ namespace :ember do
     system 'cp tmp/ember.js/dist/ember.js assets/javascripts/vendor/ember.js'
   end
 end
+
+task :update_emojis do
+  s = Dir.glob('assets/images/emoji/*.png').map {|png| png.split('/', 4)[3].gsub('.png', '')}.map{|png| "'#{png}'"}.join(", ")
+  e = "@EmojiDictionary = [#{s}]"
+  File.open("assets/scripts/config/emoij.coffee", "w") {|f| f.write(e) }
+end