gravatarify.gemspec in gravatarify-3.0.0 vs gravatarify.gemspec in gravatarify-3.1.0

@@ -23,7 +23,8 @@
   s.license          = 'MIT'
     
   s.add_development_dependency 'shoulda',       '>= 2.10.2'
   s.add_development_dependency 'rr',            '>= 0.10.5'
   s.add_development_dependency 'activesupport', '>= 3.0.0'
+  s.add_development_dependency 'rake'
 end