diff --git a/Gemfile b/Gemfile
index e0c2716..f69f42b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -10,6 +10,10 @@ platform :jruby do
   gem "posix-spawn", "~> 0.3.6"
 end
 
+platform :ruby_19 do
+  gem "simplecov"
+end
+
 group :development do
   gem 'parka'
   gem 'rake'
diff --git a/Gemfile.lock b/Gemfile.lock
index 8db6eeb..24715e5 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -20,6 +20,7 @@ GEM
     hpricot (0.8.2)
     hpricot (0.8.2-java)
     mime-types (1.16)
+    multi_json (1.0.4)
     mustache (0.11.2)
     parka (0.6.2)
       crack
@@ -46,6 +47,10 @@ GEM
       diff-lcs (~> 1.1.2)
     rspec-mocks (2.8.0)
     rubyzip (0.9.4)
+    simplecov (0.5.4)
+      multi_json (~> 1.0.3)
+      simplecov-html (~> 0.5.3)
+    simplecov-html (0.5.3)
     term-ansicolor (1.0.7)
     thor (0.14.6)
     win32console (1.3.0-x86-mingw32)
@@ -69,4 +74,5 @@ DEPENDENCIES
   rr (~> 1.0.2)
   rspec (~> 2.0)
   rubyzip
+  simplecov
   win32console (~> 1.3.0)