Rakefile in garb-0.4.0 vs Rakefile in garb-0.4.1

@@ -17,9 +17,10 @@
   s.homepage          = 'http://github.com/vigetlabs/garb'
   s.files             = %w(README.md Rakefile) + Dir.glob("lib/**/*")
   s.test_files        = Dir.glob("test/**/*")
 
   s.add_dependency("happymapper", ["~> 0.3.0"])
+  s.add_dependency("activesupport", [">= 2.3.0"])
 end
 
 Rake::GemPackageTask.new(spec) do |pkg|
   pkg.gem_spec = spec
 end