diff --git a/Gemfile.lock b/Gemfile.lock
index 691737ba3f..4948068a36 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -24,8 +24,6 @@ GEM
       execjs
     coffee-script-source (1.12.2)
     colorize (0.8.1)
-    compass-import-once (1.0.5)
-      sass (>= 3.2, < 3.5)
     concurrent-ruby (1.1.4)
     contracts (0.13.0)
     dotenv (2.6.0)
@@ -40,7 +38,7 @@ GEM
     execjs (2.7.0)
     fast_blank (1.0.0)
     fastimage (2.1.5)
-    ffi (1.10.0)
+    ffi (1.9.25)
     fog-aws (3.3.0)
       fog-core (~> 2.1)
       fog-json (~> 1.1)
@@ -80,7 +78,8 @@ GEM
       yell (~> 2.0)
     htmlentities (4.3.4)
     http_parser.rb (0.6.0)
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     ipaddress (0.8.3)
     kramdown (1.17.0)
     listen (3.0.8)
@@ -89,14 +88,12 @@ GEM
     map (6.6.0)
     memoist (0.16.0)
     mercenary (0.3.6)
-    middleman (4.2.1)
+    middleman (4.3.2)
       coffee-script (~> 2.2)
-      compass-import-once (= 1.0.5)
       haml (>= 4.0.5)
       kramdown (~> 1.2)
-      middleman-cli (= 4.2.1)
-      middleman-core (= 4.2.1)
-      sass (>= 3.4.0, < 4.0)
+      middleman-cli (= 4.3.2)
+      middleman-core (= 4.3.2)
     middleman-autoprefixer (2.7.1)
       autoprefixer-rails (>= 6.5.2, < 7.0.0)
       middleman-core (>= 3.3.3)
@@ -104,13 +101,13 @@ GEM
       addressable (~> 2.3)
       middleman-core (>= 4.0.0)
       tzinfo (>= 0.3.0)
-    middleman-cli (4.2.1)
+    middleman-cli (4.3.2)
       thor (>= 0.17.0, < 2.0)
-    middleman-core (4.2.1)
+    middleman-core (4.3.2)
       activesupport (>= 4.2, < 5.1)
       addressable (~> 2.3)
       backports (~> 3.6)
-      bundler (~> 1.1)
+      bundler
       contracts (~> 0.13.0)
       dotenv
       erubis
@@ -119,15 +116,15 @@ GEM
       fastimage (~> 2.0)
       hamster (~> 3.0)
       hashie (~> 3.4)
-      i18n (~> 0.7.0)
+      i18n (~> 0.9.0)
       listen (~> 3.0.0)
       memoist (~> 0.14)
       padrino-helpers (~> 0.13.0)
       parallel
       rack (>= 1.4.5, < 3)
-      sass (>= 3.4)
+      sassc (~> 2.0)
       servolux
-      tilt (~> 2.0)
+      tilt (~> 2.0.9)
       uglifier (~> 3.0)
     middleman-gh-pages (0.3.1)
       rake (> 0.9.3)
@@ -176,7 +173,14 @@ GEM
     redcarpet (3.4.0)
     rouge (3.3.0)
     ruby-progressbar (1.10.0)
-    sass (3.4.25)
+    sass (3.7.3)
+      sass-listen (~> 4.0.0)
+    sass-listen (4.0.0)
+      rb-fsevent (~> 0.9, >= 0.9.4)
+      rb-inotify (~> 0.9, >= 0.9.7)
+    sassc (2.0.0)
+      ffi (~> 1.9.6)
+      rake
     servolux (0.13.0)
     sprockets (3.7.2)
       concurrent-ruby (~> 1.0)