Rakefile in rubypython-0.6.2 vs Rakefile in rubypython-0.6.3

@@ -21,10 +21,10 @@
 
   self.history_file = 'History.rdoc'
   self.readme_file = 'README.rdoc'
   self.extra_rdoc_files = FileList["*.rdoc"].to_a
 
-  self.extra_deps << ['ffi', '~> 1.0.7']
+  self.extra_deps << ['ffi', '>= 1.0.7']
   self.extra_deps << ['blankslate', '>= 2.1.2.3']
 
   self.extra_dev_deps << ['rspec', '~> 2.0']
   self.extra_dev_deps << ['tilt', '~> 1.0']