diff --git a/jst.gemspec b/jst.gemspec
index 14546dd..02be5f1 100644
--- a/jst.gemspec
+++ b/jst.gemspec
@@ -22,4 +22,5 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "rake"
   spec.add_development_dependency "rspec"
   spec.add_development_dependency "therubyracer"
+  spec.add_development_dependency "rspec-its"
 end
diff --git a/lib/jst/aggregator.rb b/lib/jst/aggregator.rb
index 60beb6e..95d1b3c 100644
--- a/lib/jst/aggregator.rb
+++ b/lib/jst/aggregator.rb
@@ -9,7 +9,7 @@ def save(output=JST.config.output)
 
   def aggregate
     <<-JST
-      (function() {
+      ;(function() {
         this.Templates = {};
         #{process_all}
       }).call(this);
diff --git a/spec/aggregator_spec.rb b/spec/aggregator_spec.rb
index 6f1a1ed..30b53a1 100644
--- a/spec/aggregator_spec.rb
+++ b/spec/aggregator_spec.rb
@@ -1,4 +1,5 @@
 require 'spec_helper'
+require 'rspec/its'
 
 describe JST::Aggregator do
 
diff --git a/spec/template_prototypejs_spec.rb b/spec/template_prototypejs_spec.rb
index ae233c0..f8a35ed 100644
--- a/spec/template_prototypejs_spec.rb
+++ b/spec/template_prototypejs_spec.rb
@@ -1,4 +1,5 @@
 require 'spec_helper'
+require 'rspec/its'
 
 describe JST::Template::PrototypeJS do
   subject do