diff --git a/Gemfile.lock b/Gemfile.lock
index 4b0c8bf..253e35e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -22,11 +22,21 @@ GEM
       tzinfo (~> 0.3.37)
     atomic (1.1.14)
     builder (3.1.4)
+    concurrent-ruby (1.1.10)
+    coveralls (0.8.23)
+      json (>= 1.8, < 3)
+      simplecov (~> 0.16.1)
+      term-ansicolor (~> 1.3)
+      thor (>= 0.19.4, < 2.0)
+      tins (~> 1.6)
     diff-lcs (1.2.4)
+    docile (1.4.0)
     erubis (2.7.0)
     execjs (2.0.2)
     hike (1.2.3)
-    i18n (0.6.5)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
+    json (2.6.2)
     minitest (4.7.5)
     multi_json (1.8.2)
     rack (1.5.2)
@@ -46,6 +56,11 @@ GEM
     rspec-expectations (2.14.3)
       diff-lcs (>= 1.1.3, < 2.0)
     rspec-mocks (2.14.4)
+    simplecov (0.16.1)
+      docile (~> 1.1)
+      json (>= 1.8, < 3)
+      simplecov-html (~> 0.10.0)
+    simplecov-html (0.10.2)
     sprockets (2.10.0)
       hike (~> 1.2)
       multi_json (~> 1.0)
@@ -56,16 +71,22 @@ GEM
       activesupport (>= 3.0)
       sprockets (~> 2.8)
     stylus-source (0.38.0)
-    thor (0.18.1)
+    sync (0.5.0)
+    term-ansicolor (1.7.1)
+      tins (~> 1.0)
+    thor (1.2.1)
     thread_safe (0.1.3)
       atomic
     tilt (1.4.1)
+    tins (1.31.1)
+      sync
     tzinfo (0.3.38)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
+  coveralls (>= 0.8.0)
   railties (~> 4.0.0)
   rspec (~> 2.14.0)
   sprockets-rails (~> 2.0.0)