diff --git a/CHANGELOG.md b/CHANGELOG.md
index c225117..68c4387 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,8 @@
 
 * Output no update message as comments. #135 [Javan Makhmali]
 
+* require 'thread' to support Rubygems >= 1.6.0. #132 [Javan Makhmali]
+
 
 ### 0.6.7 / March 23rd, 2011
 
diff --git a/lib/whenever.rb b/lib/whenever.rb
index fdbf941..8fbe7a5 100644
--- a/lib/whenever.rb
+++ b/lib/whenever.rb
@@ -1,5 +1,6 @@
 require 'chronic'
 require 'active_support/all'
+require 'thread'
 
 require 'whenever/job_list'
 require 'whenever/job'