diff --git a/therubyrhino_jar.gemspec b/therubyrhino_jar.gemspec
index 12b5232..6b2bab2 100644
--- a/therubyrhino_jar.gemspec
+++ b/therubyrhino_jar.gemspec
@@ -1,20 +1,21 @@
 # -*- encoding: utf-8 -*-
-#$:.push File.expand_path("../jar", __FILE__)
+$:.push File.expand_path("../jar", __FILE__)
+require 'rhino/jar_path'
 
 Gem::Specification.new do |s|
   s.name = %q{therubyrhino_jar}
-  s.version = '1.7.4'
+  s.version = "#{Rhino::JAR_VERSION}"
   s.authors = ["Charles Lowell", "Karol Bucek"]
   s.email = ['cowboyd@thefrontside.net', 'self@kares.org']
-  
+
   s.summary     = "Rhino's jars packed for therubyrhino"
   s.description = %q{Rhino's js.jar classes packaged as a JRuby gem.}
-  
+
   s.homepage = %q{http://github.com/cowboyd/therubyrhino}
   s.rubyforge_project = %q{therubyrhino}
-  
+
   s.require_paths = ["jar"]
   s.files = `git ls-files`.split("\n").sort.
     select { |file| file == 'therubyrhino_jar.gemspec' || file =~ /^jar\// }
-  
+
 end
\ No newline at end of file