diff --git a/Gemfile.lock b/Gemfile.lock
index 03ac476..d87d9ca 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -30,7 +30,7 @@ GEM
     execjs (2.6.0)
     fastimage (1.8.1)
       addressable (~> 2.3, >= 2.3.5)
-    ffi (1.9.10)
+    ffi (1.12.2)
     haml (4.0.7)
       tilt
     hamster (2.0.0)
@@ -39,6 +39,7 @@ GEM
     i18n (0.7.0)
     json (1.8.5)
     kramdown (1.9.0)
+    libv8 (3.16.14.19)
     listen (3.0.5)
       rb-fsevent (>= 0.9.3)
       rb-inotify (>= 0.9)
@@ -103,10 +104,14 @@ GEM
     rb-inotify (0.9.5)
       ffi (>= 0.5.0)
     redcarpet (3.3.4)
+    ref (2.0.0)
     rouge (1.10.1)
     sass (3.4.21)
     sprockets (3.4.1)
       rack (> 1, < 3)
+    therubyracer (0.12.3)
+      libv8 (~> 3.16.14.15)
+      ref
     thor (0.19.1)
     thread_safe (0.3.5)
     tilt (1.4.1)
@@ -129,6 +134,7 @@ DEPENDENCIES
   middleman-syntax (~> 2.1.0)
   redcarpet (~> 3.3.2)
   rouge (~> 1.10.1)
+  therubyracer
 
 BUNDLED WITH
    1.10.6