diff --git a/ruby/stories.rb b/ruby/stories.rb
index acbfcb0..36b435a 100755
--- a/ruby/stories.rb
+++ b/ruby/stories.rb
@@ -2,7 +2,7 @@

 require 'rubygems'
 require 'json'
-require 'md5'
+require 'digest/md5'
 require 'net/http'
 require 'uri'

@@ -36,7 +36,7 @@ class StoryFinder
   end

   def sign(url)
-    "#{url}?dev_key=#{@key}&sig=#{MD5.new(@key + @secret + Time.now.to_i.to_s).hexdigest}"
+    "#{url}?dev_key=#{@key}&sig=#{Digest::MD5.hexdigest(@key + @secret + Time.now.to_i.to_s)}"
   end
 end