diff --git a/Gemfile b/Gemfile
index f045dc2..d5a805c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,7 +2,7 @@
 # the following line to use "http://" instead
 source 'https://rubygems.org'
 
-gem "middleman", "~>3.3.8"
+gem "middleman", "~> 4.6.0"
 gem "middleman-deploy"
 
 # Live-reloading plugin
diff --git a/Gemfile.lock b/Gemfile.lock
index 860034c..3bc4699 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,78 +1,95 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (4.1.9)
-      i18n (~> 0.6, >= 0.6.9)
-      json (~> 1.7, >= 1.7.7)
-      minitest (~> 5.1)
-      thread_safe (~> 0.1)
-      tzinfo (~> 1.1)
+    activesupport (7.1.5.1)
+      base64
+      benchmark (>= 0.3)
+      bigdecimal
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      connection_pool (>= 2.2.5)
+      drb
+      i18n (>= 1.6, < 2)
+      logger (>= 1.4.2)
+      minitest (>= 5.1)
+      mutex_m
+      securerandom (>= 0.3)
+      tzinfo (~> 2.0)
+    addressable (2.8.7)
+      public_suffix (>= 2.0.2, < 7.0)
+    base64 (0.2.0)
+    benchmark (0.4.0)
+    bigdecimal (3.1.9)
     bourbon (4.2.0)
       sass (~> 3.4)
       thor
-    celluloid (0.16.0)
-      timers (~> 4.0.0)
-    chunky_png (1.3.4)
-    coffee-script (2.3.0)
+    coffee-script (2.4.1)
       coffee-script-source
       execjs
-    coffee-script-source (1.9.0)
-    compass (1.0.3)
-      chunky_png (~> 1.2)
-      compass-core (~> 1.0.2)
-      compass-import-once (~> 1.0.5)
-      rb-fsevent (>= 0.9.3)
-      rb-inotify (>= 0.9)
-      sass (>= 3.3.13, < 3.5)
-    compass-core (1.0.3)
-      multi_json (~> 1.0)
-      sass (>= 3.3.0, < 3.5)
-    compass-import-once (1.0.5)
-      sass (>= 3.2, < 3.5)
+    coffee-script-source (1.12.2)
+    concurrent-ruby (1.3.5)
+    connection_pool (2.5.3)
+    contracts (0.16.1)
+    dotenv (2.8.1)
+    drb (2.2.1)
     em-websocket (0.5.1)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0.6.0)
-    erubis (2.7.0)
+    erubi (1.13.1)
     eventmachine (1.0.7)
-    execjs (2.3.0)
-    ffi (1.9.6)
-    haml (4.0.6)
+    execjs (2.10.0)
+    fast_blank (1.0.1)
+    fastimage (2.4.0)
+    ffi (1.17.2)
+    haml (6.3.0)
+      temple (>= 0.8.2)
+      thor
       tilt
-    hike (1.2.3)
-    hitimes (1.2.2)
-    hooks (0.4.0)
-      uber (~> 0.0.4)
+    hamster (3.0.0)
+      concurrent-ruby (~> 1.0)
+    hashie (5.0.0)
     http_parser.rb (0.6.0)
-    i18n (0.7.0)
-    json (1.8.2)
-    kramdown (1.5.0)
-    listen (2.8.5)
-      celluloid (>= 0.15.2)
-      rb-fsevent (>= 0.9.3)
-      rb-inotify (>= 0.9)
-    middleman (3.3.9)
+    i18n (1.14.7)
+      concurrent-ruby (~> 1.0)
+    kramdown (2.5.1)
+      rexml (>= 3.3.9)
+    listen (3.9.0)
+      rb-fsevent (~> 0.10, >= 0.10.3)
+      rb-inotify (~> 0.9, >= 0.9.10)
+    logger (1.7.0)
+    memoist (0.16.2)
+    middleman (4.6.0)
+      middleman-cli (= 4.6.0)
+      middleman-core (= 4.6.0)
+    middleman-cli (4.6.0)
+      thor (>= 0.17.0, < 1.3.0)
+    middleman-core (4.6.0)
+      activesupport (>= 6.1)
+      addressable (~> 2.4)
+      bundler (~> 2.0)
       coffee-script (~> 2.2)
-      compass (>= 1.0.0, < 2.0.0)
-      compass-import-once (= 1.0.5)
+      contracts
+      dotenv
+      erubi
       execjs (~> 2.0)
+      fast_blank
+      fastimage (~> 2.0)
       haml (>= 4.0.5)
-      kramdown (~> 1.2)
-      middleman-core (= 3.3.9)
-      middleman-sprockets (>= 3.1.2)
-      sass (>= 3.4.0, < 4.0)
-      uglifier (~> 2.5)
-    middleman-core (3.3.9)
-      activesupport (~> 4.1.0)
-      bundler (~> 1.1)
-      erubis
-      hooks (~> 0.3)
-      i18n (~> 0.7.0)
-      listen (>= 2.7.9, < 3.0)
-      padrino-helpers (~> 0.12.3)
-      rack (>= 1.4.5, < 2.0)
-      rack-test (~> 0.6.2)
-      thor (>= 0.15.2, < 2.0)
-      tilt (~> 1.4.1, < 2.0)
+      hamster (~> 3.0)
+      hashie (>= 3.4, < 6.0)
+      i18n (>= 1.6, < 1.15)
+      kramdown (~> 2.4)
+      listen (~> 3.0)
+      memoist (~> 0.14)
+      padrino-helpers (~> 0.15.0)
+      parallel
+      rack (>= 3)
+      rackup
+      sassc (~> 2.0)
+      servolux
+      tilt (~> 2.2)
+      toml
+      uglifier (>= 3, < 5)
+      webrick
     middleman-deploy (1.0.0)
       middleman-core (>= 3.2)
       net-sftp
@@ -82,65 +99,64 @@ GEM
       middleman-core (>= 3.0.2)
       multi_json (~> 1.0)
       rack-livereload
-    middleman-sprockets (3.4.1)
-      middleman-core (>= 3.3)
-      sprockets (~> 2.12.1)
-      sprockets-helpers (~> 1.1.0)
-      sprockets-sass (~> 1.3.0)
-    minitest (5.5.1)
-    multi_json (1.10.1)
+    minitest (5.25.5)
+    multi_json (1.15.0)
+    mutex_m (0.3.0)
     neat (1.7.1)
       bourbon (>= 4.0)
       sass (>= 3.3)
     net-sftp (2.1.2)
       net-ssh (>= 2.6.5)
     net-ssh (2.9.2)
-    padrino-helpers (0.12.4)
-      i18n (~> 0.6, >= 0.6.7)
-      padrino-support (= 0.12.4)
-      tilt (~> 1.4.1)
-    padrino-support (0.12.4)
-      activesupport (>= 3.1)
+    padrino-helpers (0.15.3)
+      i18n (>= 0.6.7, < 2)
+      padrino-support (= 0.15.3)
+      tilt (>= 1.4.1, < 3)
+    padrino-support (0.15.3)
+    parallel (1.27.0)
+    parslet (2.0.0)
     ptools (1.3.2)
-    rack (1.6.0)
+    public_suffix (5.1.1)
+    rack (3.1.14)
     rack-livereload (0.3.15)
       rack
-    rack-test (0.6.3)
-      rack (>= 1.0)
-    rb-fsevent (0.9.4)
-    rb-inotify (0.9.5)
-      ffi (>= 0.5.0)
-    sass (3.4.12)
-    sprockets (2.12.3)
-      hike (~> 1.2)
-      multi_json (~> 1.0)
-      rack (~> 1.0)
-      tilt (~> 1.1, != 1.3.0)
-    sprockets-helpers (1.1.0)
-      sprockets (~> 2.0)
-    sprockets-sass (1.3.1)
-      sprockets (~> 2.0)
-      tilt (~> 1.1)
-    thor (0.19.1)
-    thread_safe (0.3.4)
-    tilt (1.4.1)
-    timers (4.0.1)
-      hitimes
-    tzinfo (1.2.2)
-      thread_safe (~> 0.1)
-    uber (0.0.13)
-    uglifier (2.7.0)
-      execjs (>= 0.3.0)
-      json (>= 1.8.0)
+    rackup (2.2.1)
+      rack (>= 3)
+    rb-fsevent (0.11.2)
+    rb-inotify (0.11.1)
+      ffi (~> 1.0)
+    rexml (3.4.1)
+    sass (3.7.4)
+      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 (2.4.0)
+      ffi (~> 1.9)
+    securerandom (0.3.2)
+    servolux (0.13.0)
+    temple (0.10.3)
+    thor (1.2.2)
+    tilt (2.6.0)
+    toml (0.3.0)
+      parslet (>= 1.8.0, < 3.0.0)
+    tzinfo (2.0.6)
+      concurrent-ruby (~> 1.0)
+    uglifier (4.2.1)
+      execjs (>= 0.3.0, < 3)
+    webrick (1.9.1)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
   bourbon
-  middleman (~> 3.3.8)
+  middleman (~> 4.6.0)
   middleman-deploy
   middleman-livereload (~> 3.1.0)
   neat
   tzinfo-data
   wdm (~> 0.1.0)
+
+BUNDLED WITH
+   2.1.4