diff --git a/Gemfile b/Gemfile
old mode 100755
new mode 100644
index 379bf67..44b1b34
--- a/Gemfile
+++ b/Gemfile
@@ -2,15 +2,15 @@
 # the following line to use "https"
 source 'http://rubygems.org'
 
-gem "middleman", "~>3.4.0"
+gem "middleman", "~> 4.1.2"
 
 # Live-reloading plugin
-gem "middleman-livereload", "~> 3.1.0"
+gem "middleman-livereload", "~> 3.1.1"
 
 # For faster file watcher updates on Windows:
 gem "wdm", "~> 0.1.0", :platforms => [:mswin, :mingw]
 
-gem "middleman-syntax"
+gem "middleman-syntax", ">= 3.0.0"
 gem "redcarpet"
 
 # Windows does not come with time zone data
diff --git a/Gemfile.lock b/Gemfile.lock
old mode 100755
new mode 100644
index b311e5a..3772cf2
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,145 +1,122 @@
 GEM
   remote: http://rubygems.org/
   specs:
-    activesupport (4.2.10)
-      i18n (~> 0.7)
+    activesupport (5.0.7)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      i18n (>= 0.7, < 2)
       minitest (~> 5.1)
-      thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    capybara (2.4.4)
-      mime-types (>= 1.16)
-      nokogiri (>= 1.3.3)
-      rack (>= 1.0.0)
-      rack-test (>= 0.5.4)
-      xpath (~> 2.0)
-    chunky_png (1.3.8)
+    addressable (2.5.2)
+      public_suffix (>= 2.0.2, < 4.0)
+    backports (3.11.3)
     coffee-script (2.4.1)
       coffee-script-source
       execjs
     coffee-script-source (1.12.2)
-    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)
+    concurrent-ruby (1.0.5)
+    contracts (0.13.0)
+    dotenv (2.4.0)
     em-websocket (0.5.1)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0.6.0)
     erubis (2.7.0)
-    eventmachine (1.2.5)
+    eventmachine (1.2.7)
     execjs (2.7.0)
-    ffi (1.9.18)
+    fast_blank (1.0.0)
+    fastimage (2.1.3)
+    ffi (1.9.25)
     haml (5.0.4)
       temple (>= 0.8.0)
       tilt
-    hike (1.2.3)
-    hooks (0.4.1)
-      uber (~> 0.0.14)
+    hamster (3.0.0)
+      concurrent-ruby (~> 1.0)
+    hashie (3.5.7)
     http_parser.rb (0.6.0)
     i18n (0.7.0)
-    json (2.1.0)
-    kramdown (1.16.2)
+    kramdown (1.17.0)
     listen (3.0.8)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
-    middleman (3.4.1)
+    memoist (0.16.0)
+    middleman (4.1.14)
       coffee-script (~> 2.2)
-      compass (>= 1.0.0, < 2.0.0)
       compass-import-once (= 1.0.5)
-      execjs (~> 2.0)
       haml (>= 4.0.5)
       kramdown (~> 1.2)
-      middleman-core (= 3.4.1)
-      middleman-sprockets (>= 3.1.2)
+      middleman-cli (= 4.1.14)
+      middleman-core (= 4.1.14)
       sass (>= 3.4.0, < 4.0)
-      uglifier (~> 2.5)
-    middleman-core (3.4.1)
-      activesupport (~> 4.1)
+    middleman-cli (4.1.14)
+      thor (>= 0.17.0, < 2.0)
+    middleman-core (4.1.14)
+      activesupport (>= 4.2, < 5.1)
+      addressable (~> 2.3)
+      backports (~> 3.6)
       bundler (~> 1.1)
-      capybara (~> 2.4.4)
+      contracts (~> 0.13.0)
+      dotenv
       erubis
-      hooks (~> 0.3)
+      execjs (~> 2.0)
+      fast_blank
+      fastimage (~> 2.0)
+      hamster (~> 3.0)
+      hashie (~> 3.4)
       i18n (~> 0.7.0)
-      listen (~> 3.0.3)
-      padrino-helpers (~> 0.12.3)
-      rack (>= 1.4.5, < 2.0)
-      thor (>= 0.15.2, < 2.0)
-      tilt (~> 1.4.1, < 2.0)
+      listen (~> 3.0.0)
+      memoist (~> 0.14)
+      padrino-helpers (~> 0.13.0)
+      parallel
+      rack (>= 1.4.5, < 3)
+      sass (>= 3.4)
+      servolux
+      tilt (~> 2.0)
+      uglifier (~> 3.0)
     middleman-livereload (3.1.1)
       em-websocket (>= 0.2.0)
       middleman-core (>= 3.0.2)
       multi_json (~> 1.0)
       rack-livereload
-    middleman-sprockets (3.5.0)
-      middleman-core (>= 3.3)
-      sprockets (~> 2.12.1)
-      sprockets-helpers (~> 1.1.0)
-      sprockets-sass (~> 1.3.0)
     middleman-syntax (3.0.0)
       middleman-core (>= 3.2)
       rouge (~> 2.0)
-    mime-types (3.1)
-      mime-types-data (~> 3.2015)
-    mime-types-data (3.2016.0521)
-    mini_portile2 (2.3.0)
-    minitest (5.11.1)
+    minitest (5.11.3)
     multi_json (1.13.1)
-    nokogiri (1.8.2)
-      mini_portile2 (~> 2.3.0)
-    padrino-helpers (0.12.8.1)
+    padrino-helpers (0.13.3.4)
       i18n (~> 0.6, >= 0.6.7)
-      padrino-support (= 0.12.8.1)
-      tilt (~> 1.4.1)
-    padrino-support (0.12.8.1)
+      padrino-support (= 0.13.3.4)
+      tilt (>= 1.4.1, < 3)
+    padrino-support (0.13.3.4)
       activesupport (>= 3.1)
-    rack (1.6.8)
-    rack-livereload (0.3.16)
+    parallel (1.12.1)
+    public_suffix (3.0.2)
+    rack (2.0.5)
+    rack-livereload (0.3.17)
       rack
-    rack-test (0.8.2)
-      rack (>= 1.0, < 3)
-    rb-fsevent (0.10.2)
+    rb-fsevent (0.10.3)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)
     redcarpet (3.4.0)
     rouge (2.2.1)
     sass (3.4.25)
-    sprockets (2.12.4)
-      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)
+    servolux (0.13.0)
     temple (0.8.0)
     thor (0.20.0)
     thread_safe (0.3.6)
-    tilt (1.4.1)
-    tzinfo (1.2.4)
+    tilt (2.0.8)
+    tzinfo (1.2.5)
       thread_safe (~> 0.1)
-    uber (0.0.15)
-    uglifier (2.7.2)
-      execjs (>= 0.3.0)
-      json (>= 1.8.0)
-    xpath (2.1.0)
-      nokogiri (~> 1.3)
+    uglifier (3.2.0)
+      execjs (>= 0.3.0, < 3)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
-  middleman (~> 3.4.0)
-  middleman-livereload (~> 3.1.0)
-  middleman-syntax
+  middleman (~> 4.1.2)
+  middleman-livereload (~> 3.1.1)
+  middleman-syntax (>= 3.0.0)
   redcarpet
   tzinfo-data
   wdm (~> 0.1.0)