diff --git a/Gemfile.lock b/Gemfile.lock
index 7d075bb..e192c22 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,16 +1,17 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (5.2.4.3)
+    activesupport (6.1.6.1)
       concurrent-ruby (~> 1.0, >= 1.0.2)
-      i18n (>= 0.7, < 2)
-      minitest (~> 5.1)
-      tzinfo (~> 1.1)
-    addressable (2.7.0)
+      i18n (>= 1.6, < 2)
+      minitest (>= 5.1)
+      tzinfo (~> 2.0)
+      zeitwerk (~> 2.3)
+    addressable (2.8.0)
       public_suffix (>= 2.0.2, < 5.0)
     autoprefixer-rails (6.7.7.2)
       execjs
-    backports (3.18.1)
+    backports (3.23.0)
     chronic (0.10.2)
     chunky_png (1.3.11)
     coderay (1.1.2)
@@ -32,7 +33,7 @@ GEM
       sass (>= 3.3.0, < 3.5)
     compass-import-once (1.0.5)
       sass (>= 3.2, < 3.5)
-    concurrent-ruby (1.1.7)
+    concurrent-ruby (1.1.10)
     contracts (0.13.0)
     dotenv (2.7.6)
     em-websocket (0.5.1)
@@ -40,10 +41,10 @@ GEM
       http_parser.rb (~> 0.6.0)
     erubis (2.7.0)
     eventmachine (1.2.7)
-    execjs (2.7.0)
-    fast_blank (1.0.0)
-    fastimage (2.2.0)
-    ffi (1.13.1)
+    execjs (2.8.1)
+    fast_blank (1.0.1)
+    fastimage (2.2.6)
+    ffi (1.15.5)
     govuk_tech_docs (1.8.2)
       activesupport
       chronic (~> 0.10.2)
@@ -58,16 +59,16 @@ GEM
       openapi3_parser
       pry
       redcarpet (~> 3.3.2)
-    haml (5.1.2)
+    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 (0.9.5)
+    i18n (1.6.0)
       concurrent-ruby (~> 1.0)
-    kramdown (2.3.0)
+    kramdown (2.4.0)
       rexml
     libv8 (3.16.14.19)
     listen (3.0.8)
@@ -75,25 +76,25 @@ GEM
       rb-inotify (~> 0.9, >= 0.9.7)
     memoist (0.16.2)
     method_source (0.9.2)
-    middleman (4.3.8)
+    middleman (4.4.2)
       coffee-script (~> 2.2)
       haml (>= 4.0.5)
       kramdown (>= 2.3.0)
-      middleman-cli (= 4.3.8)
-      middleman-core (= 4.3.8)
+      middleman-cli (= 4.4.2)
+      middleman-core (= 4.4.2)
     middleman-autoprefixer (2.7.1)
       autoprefixer-rails (>= 6.5.2, < 7.0.0)
       middleman-core (>= 3.3.3)
-    middleman-cli (4.3.8)
+    middleman-cli (4.4.2)
       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 (4.3.8)
-      activesupport (>= 4.2, < 6.0)
-      addressable (~> 2.3)
+    middleman-core (4.4.2)
+      activesupport (>= 6.1, < 7.0)
+      addressable (~> 2.4)
       backports (~> 3.6)
-      bundler
+      bundler (~> 2.0)
       contracts (~> 0.13.0)
       dotenv
       erubis
@@ -102,16 +103,18 @@ GEM
       fastimage (~> 2.0)
       hamster (~> 3.0)
       hashie (~> 3.4)
-      i18n (~> 0.9.0)
+      i18n (~> 1.6.0)
       listen (~> 3.0.0)
       memoist (~> 0.14)
-      padrino-helpers (~> 0.13.0)
+      padrino-helpers (~> 0.15.0)
       parallel
       rack (>= 1.4.5, < 3)
       sassc (~> 2.0)
       servolux
       tilt (~> 2.0.9)
+      toml
       uglifier (~> 3.0)
+      webrick
     middleman-livereload (3.4.6)
       em-websocket (~> 0.5.1)
       middleman-core (>= 3.3)
@@ -127,32 +130,32 @@ GEM
       middleman-core (>= 3.2)
       rouge (~> 2.0)
     mini_portile2 (2.4.0)
-    minitest (5.14.1)
+    minitest (5.16.2)
     multi_json (1.13.1)
     nokogiri (1.10.9)
       mini_portile2 (~> 2.4.0)
     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 (0.15.1)
+      i18n (>= 0.6.7, < 2)
+      padrino-support (= 0.15.1)
       tilt (>= 1.4.1, < 3)
-    padrino-support (0.13.3.4)
-      activesupport (>= 3.1)
-    parallel (1.19.2)
+    padrino-support (0.15.1)
+    parallel (1.22.1)
+    parslet (2.0.0)
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    public_suffix (4.0.5)
-    rack (2.2.3)
+    public_suffix (4.0.7)
+    rack (2.2.4)
     rack-livereload (0.3.17)
       rack
-    rb-fsevent (0.10.4)
+    rb-fsevent (0.11.1)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     redcarpet (3.3.4)
     ref (2.0.0)
-    rexml (3.2.4)
+    rexml (3.2.5)
     rouge (2.2.1)
     ruby-enum (0.7.2)
       i18n
@@ -167,13 +170,16 @@ GEM
     therubyracer (0.12.3)
       libv8 (~> 3.16.14.15)
       ref
-    thor (1.0.1)
-    thread_safe (0.3.6)
+    thor (1.2.1)
     tilt (2.0.10)
-    tzinfo (1.2.7)
-      thread_safe (~> 0.1)
+    toml (0.3.0)
+      parslet (>= 1.8.0, < 3.0.0)
+    tzinfo (2.0.5)
+      concurrent-ruby (~> 1.0)
     uglifier (3.2.0)
       execjs (>= 0.3.0, < 3)
+    webrick (1.7.0)
+    zeitwerk (2.6.0)
 
 PLATFORMS
   ruby