diff --git a/Gemfile.lock b/Gemfile.lock
index dc1a23ade..e5d257ef3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -86,7 +86,7 @@ GEM
       archive-zip (~> 0.10)
       nokogiri (~> 1.8)
     coderay (1.1.3)
-    concurrent-ruby (1.1.8)
+    concurrent-ruby (1.2.0)
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
     crass (1.0.6)
@@ -99,11 +99,6 @@ GEM
     execjs (2.7.0)
     faker (2.13.0)
       i18n (>= 1.6, < 2)
-    faraday (1.3.0)
-      faraday-net_http (~> 1.0)
-      multipart-post (>= 1.2, < 3)
-      ruby2_keywords
-    faraday-net_http (1.0.1)
     ffi (1.13.1)
     gds-api-adapters (71.0.0)
       addressable
@@ -114,11 +109,16 @@ GEM
     globalid (0.4.2)
       activesupport (>= 4.2.0)
     govuk_ab_testing (2.4.2)
-    govuk_app_config (2.10.0)
-      logstasher (>= 1.2.2, < 2.2.0)
-      sentry-raven (~> 3.1.1)
-      statsd-ruby (~> 1.5.0)
-      unicorn (>= 5.4, < 5.9)
+    govuk_app_config (5.0.0)
+      logstasher (~> 2.1)
+      plek (>= 4, < 6)
+      prometheus_exporter (~> 2.0)
+      puma (>= 5.6, < 7.0)
+      rack-proxy (~> 0.7)
+      sentry-rails (~> 5.3)
+      sentry-ruby (~> 5.3)
+      statsd-ruby (~> 1.5)
+      unicorn (~> 6.1)
     govuk_publishing_components (24.9.1)
       govuk_app_config
       kramdown
@@ -128,7 +128,7 @@ GEM
       sprockets (< 4)
     govuk_schemas (4.3.0)
       json-schema (~> 2.8.0)
-    govuk_test (2.0.0)
+    govuk_test (2.2.0)
       brakeman (~> 4.6)
       capybara
       puma
@@ -139,7 +139,7 @@ GEM
     http-accept (1.7.0)
     http-cookie (1.0.3)
       domain_name (~> 0.5)
-    i18n (1.8.10)
+    i18n (1.12.0)
       concurrent-ruby (~> 1.0)
     image_size (2.1.0)
     io-like (0.3.1)
@@ -155,7 +155,7 @@ GEM
     json (2.5.1)
     json-schema (2.8.1)
       addressable (>= 2.4)
-    kgio (2.11.3)
+    kgio (2.11.4)
     kramdown (2.3.1)
       rexml
     link_header (0.0.8)
@@ -180,14 +180,13 @@ GEM
     mini_magick (4.10.1)
     mini_mime (1.1.0)
     mini_portile2 (2.5.0)
-    minitest (5.14.4)
+    minitest (5.17.0)
     minitest-reporters (1.4.2)
       ansi
       builder
       minitest (>= 5.0)
       ruby-progressbar
     mocha (1.11.2)
-    multipart-post (2.1.1)
     netrc (0.11.0)
     nio4r (2.5.7)
     nokogiri (1.11.3)
@@ -199,14 +198,18 @@ GEM
       ast (~> 2.4.1)
     phantomjs (2.1.1.0)
     plek (4.0.0)
+    prometheus_exporter (2.0.8)
+      webrick
     pry (0.13.1)
       coderay (~> 1.1)
       method_source (~> 1.0)
     public_suffix (4.0.6)
-    puma (5.0.2)
+    puma (6.0.2)
       nio4r (~> 2.0)
     racc (1.5.2)
-    rack (2.2.3)
+    rack (2.2.6.2)
+    rack-proxy (0.7.6)
+      rack
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rack_strip_client_ip (0.0.2)
@@ -247,10 +250,10 @@ GEM
       rake (>= 0.8.7)
       thor (>= 0.20.3, < 2.0)
     rainbow (3.0.0)
-    raindrops (0.19.1)
+    raindrops (0.20.0)
     rake (13.0.3)
     regexp_parser (1.8.2)
-    request_store (1.5.0)
+    request_store (1.5.1)
       rack (>= 1.4)
     rest-client (2.1.0)
       http-accept (>= 1.7.0, < 2.0)
@@ -286,7 +289,6 @@ GEM
     rubocop-rspec (1.42.0)
       rubocop (>= 0.87.0)
     ruby-progressbar (1.10.1)
-    ruby2_keywords (0.0.4)
     rubyzip (2.3.0)
     safe_yaml (1.0.5)
     sassc (2.4.0)
@@ -300,8 +302,11 @@ GEM
     selenium-webdriver (3.142.7)
       childprocess (>= 0.5, < 4.0)
       rubyzip (>= 1.2.2)
-    sentry-raven (3.1.2)
-      faraday (>= 1.0)
+    sentry-rails (5.7.0)
+      railties (>= 5.0)
+      sentry-ruby (~> 5.7.0)
+    sentry-ruby (5.7.0)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
     simplecov (0.19.0)
       docile (~> 1.1)
       simplecov-html (~> 0.11)
@@ -325,7 +330,7 @@ GEM
     thor (1.1.0)
     thread_safe (0.3.6)
     tilt (2.0.10)
-    tzinfo (1.2.9)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     uglifier (4.2.0)
       execjs (>= 0.3.0, < 3)
@@ -333,7 +338,7 @@ GEM
       unf_ext
     unf_ext (0.0.7.7)
     unicode-display_width (1.7.0)
-    unicorn (5.8.0)
+    unicorn (6.1.0)
       kgio (~> 2.6)
       raindrops (~> 0.7)
     webdrivers (4.4.1)
@@ -344,6 +349,7 @@ GEM
       addressable (>= 2.3.6)
       crack (>= 0.3.2)
       hashdiff (>= 0.4.0, < 2.0.0)
+    webrick (1.7.0)
     websocket-driver (0.7.3)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)
@@ -360,7 +366,7 @@ GEM
       thor
     xpath (3.2.0)
       nokogiri (~> 1.8)
-    zeitwerk (2.4.2)
+    zeitwerk (2.6.6)
 
 PLATFORMS
   ruby