diff --git a/Gemfile.lock b/Gemfile.lock
index 88c1eb9..9e66e9f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,13 +1,9 @@
 GIT
-  remote: git://github.com/rails/sass-rails.git
-  revision: 8e68c5f24ed6487277e9df531ec57b375ad1bea2
+  remote: https://github.com/rails/sass-rails.git
+  revision: 551251bddec4d6b75446cb1c1630ed26e5318f8e
   specs:
-    sass-rails (5.0.3)
-      railties (>= 4.0.0, < 5.0)
-      sass (~> 3.1)
-      sprockets (>= 2.8, < 4.0)
-      sprockets-rails (>= 2.0, < 4.0)
-      tilt (>= 1.1, < 3)
+    sass-rails (6.0.0)
+      sassc-rails (~> 2.1, >= 2.1.1)
 
 GEM
   remote: https://rubygems.org/
@@ -83,6 +79,7 @@ GEM
     execjs (2.5.2)
     faraday (0.9.1)
       multipart-post (>= 1.2, < 3)
+    ffi (1.12.2)
     gemoji (2.1.0)
     github-linguist (4.5.5)
       charlock_holmes (~> 0.7.3)
@@ -101,18 +98,19 @@ GEM
     i18n (0.7.0)
     ice_nine (0.11.1)
     json (1.8.3)
-    loofah (2.0.2)
+    loofah (2.18.0)
+      crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     mail (2.6.3)
       mime-types (>= 1.16, < 3)
     mime-types (2.6.1)
-    mini_portile (0.6.2)
+    mini_portile2 (2.1.0)
     minitest (5.7.0)
     multi_xml (0.5.5)
     multipart-post (2.0.0)
     newrelic_rpm (3.11.2.286)
-    nokogiri (1.6.6.2)
-      mini_portile (~> 0.6.0)
+    nokogiri (1.6.8.1)
+      mini_portile2 (~> 2.1.0)
     nokogumbo (1.4.1)
       nokogiri
     octokit (3.8.0)
@@ -146,8 +144,8 @@ GEM
       activesupport (>= 4.2.0.beta, < 5.0)
       nokogiri (~> 1.6.0)
       rails-deprecated_sanitizer (>= 1.0.1)
-    rails-html-sanitizer (1.0.2)
-      loofah (~> 2.0)
+    rails-html-sanitizer (1.4.3)
+      loofah (~> 2.3)
     rails_12factor (0.0.3)
       rails_serve_static_assets
       rails_stdout_logging
@@ -187,7 +185,14 @@ GEM
       crass (~> 1.0.2)
       nokogiri (>= 1.4.4)
       nokogumbo (= 1.4.1)
-    sass (3.4.14)
+    sassc (2.4.0)
+      ffi (~> 1.9)
+    sassc-rails (2.1.2)
+      railties (>= 4.0.0)
+      sassc (>= 2.0)
+      sprockets (> 3.0)
+      sprockets-rails
+      tilt
     sawyer (0.6.0)
       addressable (~> 2.3.5)
       faraday (~> 0.8, < 0.10)