diff --git a/active_reload.gemspec b/active_reload.gemspec
index 0f69cfc..efa8ce4 100644
--- a/active_reload.gemspec
+++ b/active_reload.gemspec
@@ -19,5 +19,6 @@ Gem::Specification.new do |s|
   s.require_paths = ["lib"]
 
   s.add_development_dependency "rake"
+  s.add_development_dependency "active_support"
   s.add_development_dependency "bbq"
 end