README in jnunemaker-httparty-0.3.1 vs README in jnunemaker-httparty-0.4.0

@@ -26,9 +26,10 @@
 
   httparty "http://twitter.com/statuses/public_timeline.json"
 
 == REQUIREMENTS:
 
+* Crack http://github.com/jnunemaker/crack/ - For XML and JSON parsing.
 * You like to party!
 
 == INSTALL:
 
 * sudo gem install httparty
\ No newline at end of file