diff --git a/Gemfile b/Gemfile
index 9a412ab79..eaea74264 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,7 +3,7 @@ source 'https://rubygems.org'
 gem 'html-proofer'
 
 # Middleman
-gem 'middleman', '~> 4.1.0'
+gem 'middleman', '~> 4.3.7'
 gem 'middleman-gh-pages', '~> 0.3.0'
 gem 'middleman-syntax', '~> 3.2.0'
 gem 'middleman-autoprefixer', '~> 2.10.1'
diff --git a/Gemfile.lock b/Gemfile.lock
index f7e5e9601..fd69b7ce2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (5.0.7.2)
+    activesupport (5.2.4.3)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
@@ -26,14 +26,12 @@ GEM
       aws-sigv4 (~> 1.1)
     aws-sigv4 (1.1.0)
       aws-eventstream (~> 1.0, >= 1.0.2)
-    backports (3.15.0)
+    backports (3.17.2)
     coffee-script (2.4.1)
       coffee-script-source
       execjs
     coffee-script-source (1.12.2)
-    compass-import-once (1.0.5)
-      sass (>= 3.2, < 3.5)
-    concurrent-ruby (1.1.5)
+    concurrent-ruby (1.1.6)
     contracts (0.13.0)
     dotenv (2.7.5)
     em-websocket (0.5.1)
@@ -62,7 +60,8 @@ GEM
       typhoeus (~> 1.3)
       yell (~> 2.0)
     http_parser.rb (0.6.0)
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     jmespath (1.4.0)
     kramdown (1.17.0)
     listen (3.0.8)
@@ -70,24 +69,22 @@ GEM
       rb-inotify (~> 0.9, >= 0.9.7)
     memoist (0.16.2)
     mercenary (0.4.0)
-    middleman (4.1.14)
+    middleman (4.3.7)
       coffee-script (~> 2.2)
-      compass-import-once (= 1.0.5)
       haml (>= 4.0.5)
       kramdown (~> 1.2)
-      middleman-cli (= 4.1.14)
-      middleman-core (= 4.1.14)
-      sass (>= 3.4.0, < 4.0)
+      middleman-cli (= 4.3.7)
+      middleman-core (= 4.3.7)
     middleman-autoprefixer (2.10.1)
       autoprefixer-rails (~> 9.1)
       middleman-core (>= 3.3.3)
-    middleman-cli (4.1.14)
+    middleman-cli (4.3.7)
       thor (>= 0.17.0, < 2.0)
-    middleman-core (4.1.14)
-      activesupport (>= 4.2, < 5.1)
+    middleman-core (4.3.7)
+      activesupport (>= 4.2, < 6.0)
       addressable (~> 2.3)
       backports (~> 3.6)
-      bundler (~> 1.1)
+      bundler
       contracts (~> 0.13.0)
       dotenv
       erubis
@@ -96,15 +93,15 @@ 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)
@@ -122,7 +119,7 @@ GEM
       mime-types-data (~> 3.2015)
     mime-types-data (3.2019.1009)
     mini_portile2 (2.4.0)
-    minitest (5.14.0)
+    minitest (5.14.1)
     nokogiri (1.10.7)
       mini_portile2 (~> 2.4.0)
     nokogumbo (2.0.2)
@@ -134,18 +131,19 @@ GEM
     padrino-support (0.13.3.4)
       activesupport (>= 3.1)
     parallel (1.19.1)
-    public_suffix (4.0.3)
-    rack (2.0.8)
+    public_suffix (4.0.5)
+    rack (2.2.2)
     rack-livereload (0.3.17)
       rack
     rainbow (3.0.0)
     rake (13.0.1)
-    rb-fsevent (0.10.3)
+    rb-fsevent (0.10.4)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     redcarpet (3.5.0)
     rouge (3.15.0)
-    sass (3.4.25)
+    sassc (2.3.0)
+      ffi (~> 1.9)
     servolux (0.13.0)
     sprockets (3.7.2)
       concurrent-ruby (~> 1.0)
@@ -156,7 +154,7 @@ GEM
     tilt (2.0.10)
     typhoeus (1.3.1)
       ethon (>= 0.9.0)
-    tzinfo (1.2.6)
+    tzinfo (1.2.7)
       thread_safe (~> 0.1)
     uglifier (3.2.0)
       execjs (>= 0.3.0, < 3)
@@ -170,7 +168,7 @@ DEPENDENCIES
   aws-sdk-s3
   html-proofer
   listen (= 3.0.8)
-  middleman (~> 4.1.0)
+  middleman (~> 4.3.7)
   middleman-autoprefixer (~> 2.10.1)
   middleman-gh-pages (~> 0.3.0)
   middleman-livereload (~> 3.4.0)