diff --git a/Gemfile b/Gemfile
index 1e7b61ae3..ef19fd3a4 100644
--- a/Gemfile
+++ b/Gemfile
@@ -23,6 +23,7 @@ gem "pundit"
 gem "rack-attack"
 gem "rails-html-sanitizer"
 gem "rake"
+gem "redis"
 gem "rotp"
 gem "rqrcode"
 gem "sentry-sidekiq"
diff --git a/Gemfile.lock b/Gemfile.lock
index f435012b5..92ead4cfc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -203,12 +203,11 @@ GEM
       rouge
       sprockets (>= 3)
       sprockets-rails
-    govuk_sidekiq (8.0.1)
+    govuk_sidekiq (9.0.0)
       gds-api-adapters (>= 19.1.0)
       govuk_app_config (>= 1.1)
-      redis (< 5)
-      redis-namespace (~> 1.6)
-      sidekiq (~> 6.5, >= 6.5.12)
+      redis-client (>= 0.22.2)
+      sidekiq (~> 7.0, < 8)
     govuk_test (4.1.0)
       brakeman (>= 5.0.2)
       capybara (>= 3.36)
@@ -544,18 +543,18 @@ GEM
     pundit (2.4.0)
       activesupport (>= 3.0.0)
     racc (1.8.1)
-    rack (2.2.9)
+    rack (3.1.7)
     rack-attack (6.7.0)
       rack (>= 1.0, < 4)
     rack-proxy (0.7.7)
       rack
-    rack-session (1.0.2)
-      rack (< 3)
+    rack-session (2.0.0)
+      rack (>= 3.0.0)
     rack-test (2.1.0)
       rack (>= 1.3)
-    rackup (1.0.0)
-      rack (< 3)
-      webrick
+    rackup (2.1.0)
+      rack (>= 3)
+      webrick (~> 1.8)
     rails (7.2.1)
       actioncable (= 7.2.1)
       actionmailbox (= 7.2.1)
@@ -597,9 +596,10 @@ GEM
     rdoc (6.7.0)
       psych (>= 4.0.0)
     recursive-open-struct (1.2.2)
-    redis (4.8.1)
-    redis-namespace (1.11.0)
-      redis (>= 4)
+    redis (5.3.0)
+      redis-client (>= 0.22.0)
+    redis-client (0.22.2)
+      connection_pool
     regexp_parser (2.9.2)
     reline (0.5.10)
       io-console (~> 0.5)
@@ -680,10 +680,12 @@ GEM
       sentry-ruby (~> 5.19.0)
       sidekiq (>= 3.0)
     shoulda-context (2.0.0)
-    sidekiq (6.5.12)
-      connection_pool (>= 2.2.5, < 3)
-      rack (~> 2.0)
-      redis (>= 4.5.0, < 5)
+    sidekiq (7.3.2)
+      concurrent-ruby (< 2)
+      connection_pool (>= 2.3.0)
+      logger
+      rack (>= 2.2.4)
+      redis-client (>= 0.22.2)
     simplecov (0.22.0)
       docile (~> 1.1)
       simplecov-html (~> 0.11)
@@ -775,6 +777,7 @@ DEPENDENCIES
   rails-controller-testing
   rails-html-sanitizer
   rake
+  redis
   rotp
   rqrcode
   rubocop-govuk
diff --git a/config/initializers/sidekiq.rb b/config/initializers/sidekiq.rb
deleted file mode 100644
index 98860c611..000000000
--- a/config/initializers/sidekiq.rb
+++ /dev/null
@@ -1,2 +0,0 @@
-# Use Sidekiq strict args to force Sidekiq 6 deprecations to error ahead of upgrade to Sidekiq 7
-Sidekiq.strict_args!
diff --git a/test/integration/cookies_security_test.rb b/test/integration/cookies_security_test.rb
index a7888b909..eeeb1b16f 100644
--- a/test/integration/cookies_security_test.rb
+++ b/test/integration/cookies_security_test.rb
@@ -6,8 +6,8 @@ class CookiesSecurityTest < ActionDispatch::IntegrationTest
     sign_up_with user.email, user.password
     visit new_user_session_path
     response_cookies = Capybara.current_session.driver.response.headers["Set-Cookie"]
-    assert_match "HttpOnly", response_cookies
-    assert_match "SameSite=Lax", response_cookies
+    assert_match "httponly", response_cookies
+    assert_match "samesite=lax", response_cookies
   end
 
   def sign_up_with(email, password)