diff --git a/Gemfile.lock b/Gemfile.lock
index a2aae30..bec42ac 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,13 +1,12 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (4.0.2)
-      i18n (~> 0.6, >= 0.6.4)
-      minitest (~> 4.2)
-      multi_json (~> 1.3)
+    activesupport (4.1.11)
+      i18n (~> 0.6, >= 0.6.9)
+      json (~> 1.7, >= 1.7.7)
+      minitest (~> 5.1)
       thread_safe (~> 0.1)
-      tzinfo (~> 0.3.37)
-    atomic (1.1.14)
+      tzinfo (~> 1.1)
     blankslate (2.1.2.4)
     classifier (1.3.4)
       fast-stemmer (>= 1.0.0)
@@ -15,10 +14,13 @@ GEM
     colorator (0.1)
     commander (4.1.6)
       highline (~> 1.6.11)
+    concurrent-ruby (1.1.5)
     fast-stemmer (1.0.2)
+    ffi (1.9.3)
     ffi (1.9.3-x86-mingw32)
     highline (1.6.20)
-    i18n (0.6.9)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     jekyll (1.4.2)
       classifier (~> 1.3)
       colorator (~> 0.1)
@@ -30,6 +32,7 @@ GEM
       redcarpet (~> 2.3.0)
       safe_yaml (~> 0.9.7)
       toml (~> 0.1.0)
+    json (1.8.6)
     kramdown (1.3.1)
     liquid (2.5.5)
     listen (1.3.1)
@@ -37,11 +40,11 @@ GEM
       rb-inotify (>= 0.9)
       rb-kqueue (>= 0.2)
     maruku (0.7.1)
-    minitest (4.7.5)
-    multi_json (1.8.4)
+    minitest (5.13.0)
     parslet (1.5.0)
       blankslate (~> 2.0)
-    posix-spawn (0.3.8)
+    posix-spawn (0.3.13)
+    pygments.rb (0.5.4)
       posix-spawn (~> 0.3.6)
       yajl-ruby (~> 1.1.0)
     rake (10.1.1)
@@ -54,14 +57,16 @@ GEM
     safe_yaml (0.9.7)
     stringex (2.2.0)
     thor (0.18.1)
-    thread_safe (0.1.3)
-      atomic
+    thread_safe (0.3.6)
     toml (0.1.0)
       parslet (~> 1.5.0)
-    tzinfo (0.3.38)
+    tzinfo (1.2.5)
+      thread_safe (~> 0.1)
+    yajl-ruby (1.1.0)
     yajl-ruby (1.1.0-x86-mingw32)
 
 PLATFORMS
+  ruby
   x86-mingw32
 
 DEPENDENCIES