diff --git a/Gemfile b/Gemfile
index f72180485..94dbb3b31 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,7 +2,7 @@ ruby File.read(".ruby-version").strip
 
 source "https://rubygems.org"
 
-gem "rails", "~> 5.2"
+gem "rails", "~> 6.0"
 
 gem "bootsnap"
 gem "chartkick"
diff --git a/Gemfile.lock b/Gemfile.lock
index 2967808cc..70dc6888b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,50 +1,63 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    actioncable (5.2.3)
-      actionpack (= 5.2.3)
+    actioncable (6.0.3.1)
+      actionpack (= 6.0.3.1)
       nio4r (~> 2.0)
       websocket-driver (>= 0.6.1)
-    actionmailer (5.2.3)
-      actionpack (= 5.2.3)
-      actionview (= 5.2.3)
-      activejob (= 5.2.3)
+    actionmailbox (6.0.3.1)
+      actionpack (= 6.0.3.1)
+      activejob (= 6.0.3.1)
+      activerecord (= 6.0.3.1)
+      activestorage (= 6.0.3.1)
+      activesupport (= 6.0.3.1)
+      mail (>= 2.7.1)
+    actionmailer (6.0.3.1)
+      actionpack (= 6.0.3.1)
+      actionview (= 6.0.3.1)
+      activejob (= 6.0.3.1)
       mail (~> 2.5, >= 2.5.4)
       rails-dom-testing (~> 2.0)
-    actionpack (5.2.3)
-      actionview (= 5.2.3)
-      activesupport (= 5.2.3)
-      rack (~> 2.0)
+    actionpack (6.0.3.1)
+      actionview (= 6.0.3.1)
+      activesupport (= 6.0.3.1)
+      rack (~> 2.0, >= 2.0.8)
       rack-test (>= 0.6.3)
       rails-dom-testing (~> 2.0)
-      rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    actionview (5.2.3)
-      activesupport (= 5.2.3)
+      rails-html-sanitizer (~> 1.0, >= 1.2.0)
+    actiontext (6.0.3.1)
+      actionpack (= 6.0.3.1)
+      activerecord (= 6.0.3.1)
+      activestorage (= 6.0.3.1)
+      activesupport (= 6.0.3.1)
+      nokogiri (>= 1.8.5)
+    actionview (6.0.3.1)
+      activesupport (= 6.0.3.1)
       builder (~> 3.1)
       erubi (~> 1.4)
       rails-dom-testing (~> 2.0)
-      rails-html-sanitizer (~> 1.0, >= 1.0.3)
-    activejob (5.2.3)
-      activesupport (= 5.2.3)
+      rails-html-sanitizer (~> 1.1, >= 1.2.0)
+    activejob (6.0.3.1)
+      activesupport (= 6.0.3.1)
       globalid (>= 0.3.6)
-    activemodel (5.2.3)
-      activesupport (= 5.2.3)
-    activerecord (5.2.3)
-      activemodel (= 5.2.3)
-      activesupport (= 5.2.3)
-      arel (>= 9.0)
-    activestorage (5.2.3)
-      actionpack (= 5.2.3)
-      activerecord (= 5.2.3)
+    activemodel (6.0.3.1)
+      activesupport (= 6.0.3.1)
+    activerecord (6.0.3.1)
+      activemodel (= 6.0.3.1)
+      activesupport (= 6.0.3.1)
+    activestorage (6.0.3.1)
+      actionpack (= 6.0.3.1)
+      activejob (= 6.0.3.1)
+      activerecord (= 6.0.3.1)
       marcel (~> 0.3.1)
-    activesupport (5.2.3)
+    activesupport (6.0.3.1)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
+      zeitwerk (~> 2.2, >= 2.2.2)
     addressable (2.7.0)
       public_suffix (>= 2.0.2, < 5.0)
-    arel (9.0.0)
     ast (2.4.0)
     better_errors (2.7.1)
       coderay (>= 1.0.0)
@@ -159,7 +172,7 @@ GEM
     http-accept (1.7.0)
     http-cookie (1.0.3)
       domain_name (~> 0.5)
-    i18n (1.8.2)
+    i18n (1.8.3)
       concurrent-ruby (~> 1.0)
     ipaddress (0.8.3)
     jwt (2.2.1)
@@ -197,7 +210,7 @@ GEM
     mime-types (3.3.1)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2020.0512)
-    mimemagic (0.3.4)
+    mimemagic (0.3.5)
     mini_mime (1.0.2)
     mini_portile2 (2.4.0)
     minitest (5.14.1)
@@ -245,30 +258,32 @@ GEM
       rack
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
-    rails (5.2.3)
-      actioncable (= 5.2.3)
-      actionmailer (= 5.2.3)
-      actionpack (= 5.2.3)
-      actionview (= 5.2.3)
-      activejob (= 5.2.3)
-      activemodel (= 5.2.3)
-      activerecord (= 5.2.3)
-      activestorage (= 5.2.3)
-      activesupport (= 5.2.3)
+    rails (6.0.3.1)
+      actioncable (= 6.0.3.1)
+      actionmailbox (= 6.0.3.1)
+      actionmailer (= 6.0.3.1)
+      actionpack (= 6.0.3.1)
+      actiontext (= 6.0.3.1)
+      actionview (= 6.0.3.1)
+      activejob (= 6.0.3.1)
+      activemodel (= 6.0.3.1)
+      activerecord (= 6.0.3.1)
+      activestorage (= 6.0.3.1)
+      activesupport (= 6.0.3.1)
       bundler (>= 1.3.0)
-      railties (= 5.2.3)
+      railties (= 6.0.3.1)
       sprockets-rails (>= 2.0.0)
     rails-dom-testing (2.0.3)
       activesupport (>= 4.2.0)
       nokogiri (>= 1.6)
     rails-html-sanitizer (1.3.0)
       loofah (~> 2.3)
-    railties (5.2.3)
-      actionpack (= 5.2.3)
-      activesupport (= 5.2.3)
+    railties (6.0.3.1)
+      actionpack (= 6.0.3.1)
+      activesupport (= 6.0.3.1)
       method_source
       rake (>= 0.8.7)
-      thor (>= 0.19.0, < 2.0)
+      thor (>= 0.20.3, < 2.0)
     rainbow (3.0.0)
     raindrops (0.19.1)
     rake (13.0.1)
@@ -373,7 +388,7 @@ GEM
       activesupport (>= 4.2)
     spring-commands-rspec (1.0.4)
       spring (>= 0.9.1)
-    sprockets (4.0.0)
+    sprockets (4.0.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
     sprockets-rails (3.2.1)
@@ -408,11 +423,12 @@ GEM
       addressable (>= 2.3.6)
       crack (>= 0.3.2)
       hashdiff (>= 0.4.0, < 2.0.0)
-    websocket-driver (0.7.1)
+    websocket-driver (0.7.2)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)
     xpath (3.2.0)
       nokogiri (~> 1.8)
+    zeitwerk (2.3.0)
 
 PLATFORMS
   ruby
@@ -437,7 +453,7 @@ DEPENDENCIES
   pg (~> 1)
   plek
   pry
-  rails (~> 5.2)
+  rails (~> 6.0)
   rspec-rails
   rubocop-govuk (~> 3)
   scss_lint-govuk (~> 0)