Rakefile in pdfkit-0.4.2 vs Rakefile in pdfkit-0.4.3

@@ -1,6 +1,8 @@
 require 'rubygems'
 require 'rake'
+require 'bundler'
+Bundler.require(:development)
 
 begin
   require 'jeweler'
   Jeweler::Tasks.new do |gem|
     gem.name = "pdfkit"