diff --git a/Gemfile.lock b/Gemfile.lock
index 6f3efb4..eeb6818 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -10,16 +10,16 @@ GIT
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (5.0.7)
+    activesupport (7.0.4.3)
       concurrent-ruby (~> 1.0, >= 1.0.2)
-      i18n (>= 0.7, < 2)
-      minitest (~> 5.1)
-      tzinfo (~> 1.1)
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+      i18n (>= 1.6, < 2)
+      minitest (>= 5.1)
+      tzinfo (~> 2.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     autoprefixer-rails (6.7.7.2)
       execjs
-    backports (3.11.4)
+    backports (3.24.0)
     chronic (0.10.2)
     chunky_png (1.3.10)
     coderay (1.1.2)
@@ -41,18 +41,18 @@ GEM
       sass (>= 3.3.0, < 3.5)
     compass-import-once (1.0.5)
       sass (>= 3.2, < 3.5)
-    concurrent-ruby (1.1.3)
-    contracts (0.13.0)
-    dotenv (2.5.0)
+    concurrent-ruby (1.2.2)
+    contracts (0.17)
+    dotenv (2.8.1)
     em-websocket (0.5.1)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0.6.0)
     erubis (2.7.0)
     eventmachine (1.2.7)
-    execjs (2.7.0)
-    fast_blank (1.0.0)
-    fastimage (2.1.4)
-    ffi (1.9.25)
+    execjs (2.8.1)
+    fast_blank (1.0.1)
+    fastimage (2.2.6)
+    ffi (1.15.5)
     govuk_tech_docs (1.6.3)
       activesupport
       chronic (~> 0.10.2)
@@ -67,43 +67,43 @@ GEM
       openapi3_parser
       pry
       redcarpet (~> 3.3.2)
-    haml (5.0.4)
+    haml (5.2.2)
       temple (>= 0.8.0)
       tilt
     hamster (3.0.0)
       concurrent-ruby (~> 1.0)
     hashie (3.6.0)
     http_parser.rb (0.6.0)
-    i18n (0.7.0)
-    kramdown (1.17.0)
+    i18n (1.6.0)
+      concurrent-ruby (~> 1.0)
+    kramdown (2.4.0)
+      rexml
     libv8 (3.16.14.19)
-    listen (3.0.8)
-      rb-fsevent (~> 0.9, >= 0.9.4)
-      rb-inotify (~> 0.9, >= 0.9.7)
-    memoist (0.16.0)
+    listen (3.8.0)
+      rb-fsevent (~> 0.10, >= 0.10.3)
+      rb-inotify (~> 0.9, >= 0.9.10)
+    memoist (0.16.2)
     method_source (0.9.2)
-    middleman (4.2.1)
+    middleman (4.4.3)
       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)
+      haml (>= 4.0.5, < 6.0)
+      kramdown (>= 2.3.0)
+      middleman-cli (= 4.4.3)
+      middleman-core (= 4.4.3)
     middleman-autoprefixer (2.7.1)
       autoprefixer-rails (>= 6.5.2, < 7.0.0)
       middleman-core (>= 3.3.3)
-    middleman-cli (4.2.1)
+    middleman-cli (4.4.3)
       thor (>= 0.17.0, < 2.0)
     middleman-compass (4.0.1)
       compass (>= 1.0.0, < 2.0.0)
       middleman-core (>= 4.0.0)
-    middleman-core (4.2.1)
-      activesupport (>= 4.2, < 5.1)
-      addressable (~> 2.3)
+    middleman-core (4.4.3)
+      activesupport (>= 6.1, < 7.1)
+      addressable (~> 2.4)
       backports (~> 3.6)
-      bundler (~> 1.1)
-      contracts (~> 0.13.0)
+      bundler (~> 2.0)
+      contracts (~> 0.13)
       dotenv
       erubis
       execjs (~> 2.0)
@@ -111,16 +111,18 @@ GEM
       fastimage (~> 2.0)
       hamster (~> 3.0)
       hashie (~> 3.4)
-      i18n (~> 0.7.0)
-      listen (~> 3.0.0)
+      i18n (~> 1.6.0)
+      listen (~> 3.0)
       memoist (~> 0.14)
-      padrino-helpers (~> 0.13.0)
+      padrino-helpers (~> 0.15.0)
       parallel
       rack (>= 1.4.5, < 3)
-      sass (>= 3.4)
+      sassc (~> 2.0)
       servolux
-      tilt (~> 2.0)
+      tilt (~> 2.0.9)
+      toml
       uglifier (~> 3.0)
+      webrick
     middleman-livereload (3.4.6)
       em-websocket (~> 0.5.1)
       middleman-core (>= 3.3)
@@ -132,50 +134,55 @@ GEM
       middleman-core (>= 3.2)
       rouge (~> 2.0)
     mini_portile2 (2.3.0)
-    minitest (5.11.3)
+    minitest (5.18.0)
     multi_json (1.13.1)
     nokogiri (1.8.5)
       mini_portile2 (~> 2.3.0)
     openapi3_parser (0.5.2)
       commonmarker (~> 0.17)
-    padrino-helpers (0.13.3.4)
-      i18n (~> 0.6, >= 0.6.7)
-      padrino-support (= 0.13.3.4)
+    padrino-helpers (0.15.3)
+      i18n (>= 0.6.7, < 2)
+      padrino-support (= 0.15.3)
       tilt (>= 1.4.1, < 3)
-    padrino-support (0.13.3.4)
-      activesupport (>= 3.1)
-    parallel (1.12.1)
+    padrino-support (0.15.3)
+    parallel (1.22.1)
+    parslet (2.0.0)
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    public_suffix (3.0.3)
-    rack (2.0.6)
+    public_suffix (5.0.1)
+    rack (2.2.6.4)
     rack-livereload (0.3.17)
       rack
-    rb-fsevent (0.10.3)
-    rb-inotify (0.9.10)
-      ffi (>= 0.5.0, < 2)
+    rb-fsevent (0.11.2)
+    rb-inotify (0.10.1)
+      ffi (~> 1.0)
     redcarpet (3.3.4)
     ref (2.0.0)
+    rexml (3.2.5)
     rouge (2.2.1)
     ruby-enum (0.7.2)
       i18n
     sass (3.4.25)
+    sassc (2.4.0)
+      ffi (~> 1.9)
     servolux (0.13.0)
-    sprockets (3.7.2)
+    sprockets (4.2.0)
       concurrent-ruby (~> 1.0)
-      rack (> 1, < 3)
-    temple (0.8.0)
+      rack (>= 2.2.4, < 4)
+    temple (0.10.0)
     therubyracer (0.12.3)
       libv8 (~> 3.16.14.15)
       ref
-    thor (0.20.3)
-    thread_safe (0.3.6)
-    tilt (2.0.8)
-    tzinfo (1.2.5)
-      thread_safe (~> 0.1)
+    thor (1.2.1)
+    tilt (2.0.11)
+    toml (0.3.0)
+      parslet (>= 1.8.0, < 3.0.0)
+    tzinfo (2.0.6)
+      concurrent-ruby (~> 1.0)
     uglifier (3.2.0)
       execjs (>= 0.3.0, < 3)
+    webrick (1.8.1)
 
 PLATFORMS
   ruby