diff --git a/Gemfile b/Gemfile
index f4a3339..0fcf811 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,6 +3,7 @@ source 'http://rubygems.org'
 gem 'rails', '3.1.0.beta1'
 gem 'geokit'
 gem 'devise'
+gem "therubyracer", :require => 'v8'
 
 # Asset template engines
 gem 'sass'
diff --git a/Gemfile.lock b/Gemfile.lock
index 06934d1..97e977e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -92,6 +92,7 @@ GEM
       rack (~> 1.0)
       tilt (~> 1.0)
     sqlite3 (1.3.3)
+    therubyracer (0.8.1)
     thor (0.14.6)
     tilt (1.3)
     treetop (1.4.9)
@@ -117,5 +118,6 @@ DEPENDENCIES
   rails (= 3.1.0.beta1)
   sass
   sqlite3
+  therubyracer
   turn
   uglifier