Gemfile in timespan-0.4.5 vs Gemfile in timespan-0.4.6

@@ -1,8 +1,9 @@
 source :rubygems
 
 gem 'chronic'
 gem 'chronic_duration'
+gem 'activesupport', '>= 3.0.0'
 gem 'spanner'
 gem 'xduration', '~> 2.2'
 
 group :test, :development do
   gem "rspec", 		">= 2.8.0"