diff --git a/Gemfile.lock b/Gemfile.lock
index 7f01ad12..7c671e7f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,16 +1,17 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (5.2.6)
+    activesupport (6.1.4)
       concurrent-ruby (~> 1.0, >= 1.0.2)
-      i18n (>= 0.7, < 2)
-      minitest (~> 5.1)
-      tzinfo (~> 1.1)
+      i18n (>= 1.6, < 2)
+      minitest (>= 5.1)
+      tzinfo (~> 2.0)
+      zeitwerk (~> 2.3)
     addressable (2.8.0)
       public_suffix (>= 2.0.2, < 5.0)
     ast (2.4.2)
-    autoprefixer-rails (10.2.5.0)
-      execjs (< 2.8.0)
+    autoprefixer-rails (10.2.5.1)
+      execjs (> 0)
     backports (3.21.0)
     chronic (0.10.2)
     chunky_png (1.4.0)
@@ -18,8 +19,7 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.12.2)
-    commonmarker (0.21.2)
-      ruby-enum (~> 0.5)
+    commonmarker (0.22.0)
     compass (1.0.3)
       chunky_png (~> 1.2)
       compass-core (~> 1.0.2)
@@ -32,7 +32,7 @@ GEM
       sass (>= 3.3.0, < 3.5)
     compass-import-once (1.0.5)
       sass (>= 3.2, < 3.5)
-    concurrent-ruby (1.1.8)
+    concurrent-ruby (1.1.9)
     contracts (0.13.0)
     diff-lcs (1.4.4)
     dotenv (2.7.6)
@@ -41,11 +41,11 @@ GEM
       http_parser.rb (~> 0.6.0)
     erubis (2.7.0)
     eventmachine (1.2.7)
-    execjs (2.7.0)
+    execjs (2.8.1)
     fast_blank (1.0.0)
-    fastimage (2.2.3)
-    ffi (1.15.0)
-    govuk_tech_docs (2.3.0)
+    fastimage (2.2.4)
+    ffi (1.15.3)
+    govuk_tech_docs (2.4.1)
       autoprefixer-rails (~> 10.2)
       chronic (~> 0.10.2)
       middleman (~> 4.0)
@@ -57,15 +57,15 @@ GEM
       middleman-syntax (~> 3.2.0)
       nokogiri
       openapi3_parser (~> 0.9.0)
-      redcarpet (~> 3.5.0)
-    haml (5.2.1)
+      redcarpet (~> 3.5.1)
+    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)
     jaro_winkler (1.5.4)
     json (2.5.1)
@@ -75,25 +75,25 @@ GEM
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
     memoist (0.16.2)
-    middleman (4.3.11)
+    middleman (4.4.0)
       coffee-script (~> 2.2)
       haml (>= 4.0.5)
       kramdown (>= 2.3.0)
-      middleman-cli (= 4.3.11)
-      middleman-core (= 4.3.11)
+      middleman-cli (= 4.4.0)
+      middleman-core (= 4.4.0)
     middleman-autoprefixer (2.10.0)
       autoprefixer-rails (>= 9.1.4)
       middleman-core (>= 3.3.3)
-    middleman-cli (4.3.11)
+    middleman-cli (4.4.0)
       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 (4.3.11)
-      activesupport (>= 4.2, < 6.0)
-      addressable (~> 2.3)
+    middleman-core (4.4.0)
+      activesupport (>= 6.1, < 7.0)
+      addressable (~> 2.4)
       backports (~> 3.6)
-      bundler
+      bundler (~> 2.0)
       contracts (~> 0.13.0)
       dotenv
       erubis
@@ -102,16 +102,18 @@ 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 (3.4.7)
       em-websocket (~> 0.5.1)
       middleman-core (>= 3.3)
@@ -126,25 +128,25 @@ GEM
     middleman-syntax (3.2.0)
       middleman-core (>= 3.2)
       rouge (~> 3.2)
-    mini_portile2 (2.5.1)
+    mini_portile2 (2.5.3)
     minitest (5.14.4)
     multi_json (1.15.0)
-    nokogiri (1.11.4)
+    nokogiri (1.11.7)
       mini_portile2 (~> 2.5.0)
       racc (~> 1.4)
     openapi3_parser (0.9.0)
       commonmarker (~> 0.17)
       psych (~> 3.1)
     ostruct (0.3.3)
-    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)
+    padrino-support (0.15.1)
     parallel (1.20.1)
     parser (3.0.0.0)
       ast (~> 2.4.1)
+    parslet (2.0.0)
     psych (3.3.2)
     public_suffix (4.0.6)
     racc (1.5.2)
@@ -190,8 +192,6 @@ GEM
       rubocop (>= 0.72.0)
     rubocop-rspec (1.41.0)
       rubocop (>= 0.68.1)
-    ruby-enum (0.9.0)
-      i18n
     ruby-progressbar (1.11.0)
     sass (3.4.25)
     sassc (2.4.0)
@@ -202,13 +202,16 @@ GEM
       rack (> 1, < 3)
     temple (0.8.2)
     thor (1.1.0)
-    thread_safe (0.3.6)
     tilt (2.0.10)
-    tzinfo (1.2.9)
-      thread_safe (~> 0.1)
+    toml (0.3.0)
+      parslet (>= 1.8.0, < 3.0.0)
+    tzinfo (2.0.4)
+      concurrent-ruby (~> 1.0)
     uglifier (3.2.0)
       execjs (>= 0.3.0, < 3)
     unicode-display_width (1.6.1)
+    webrick (1.7.0)
+    zeitwerk (2.4.2)
 
 PLATFORMS
   ruby
@@ -224,4 +227,4 @@ DEPENDENCIES
   wdm (~> 0.1.0)
 
 BUNDLED WITH
-   2.1.4
+   2.2.15