diff --git a/jasmine-headless-webkit.gemspec b/jasmine-headless-webkit.gemspec
index 7a7bc62..6338b32 100644
--- a/jasmine-headless-webkit.gemspec
+++ b/jasmine-headless-webkit.gemspec
@@ -21,6 +21,6 @@ Gem::Specification.new do |s|
   s.require_paths = ["lib"]
 
   s.add_dependency 'jasmine'
-  s.add_dependency 'coffee-script'
+  s.add_dependency 'coffee-script', '>= 2.2'
   s.add_dependency 'rainbow'
 end