diff --git a/lib/jekyll/migrators/tumblr.rb b/lib/jekyll/migrators/tumblr.rb
index d7cb3969..602f4169 100644
--- a/lib/jekyll/migrators/tumblr.rb
+++ b/lib/jekyll/migrators/tumblr.rb
@@ -2,7 +2,7 @@ require 'rubygems'
 require 'nokogiri'
 require 'open-uri'
 require 'fileutils'
-require 'CGI'
+require 'cgi'
 require 'iconv'
 require 'date'