diff --git a/Gemfile.lock b/Gemfile.lock
index 1b7efe8f16..272bce0cde 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -110,8 +110,7 @@ GEM
     date (3.3.4)
     diff-lcs (1.5.0)
     docile (1.4.0)
-    domain_name (0.5.20190701)
-      unf (>= 0.0.5, < 1.0.0)
+    domain_name (0.6.20231109)
     erubi (1.12.0)
     et-orbi (1.2.7)
       tzinfo
@@ -186,11 +185,11 @@ GEM
       sprockets (>= 3)
     govuk_schemas (4.7.0)
       json-schema (>= 2.8, < 4.2)
-    govuk_sidekiq (7.1.4)
+    govuk_sidekiq (7.1.5)
       gds-api-adapters (>= 19.1.0)
       govuk_app_config (>= 1.1)
       redis-namespace (~> 1.6)
-      sidekiq (> 6.5.10, < 7)
+      sidekiq (~> 6.5, >= 6.5.12)
     govuk_test (4.0.1)
       brakeman (>= 5.0.2)
       capybara (>= 3.36)
@@ -515,7 +514,7 @@ GEM
     plek (5.0.0)
     prometheus_exporter (2.0.8)
       webrick
-    public_suffix (5.0.3)
+    public_suffix (5.0.4)
     puma (6.4.0)
       nio4r (~> 2.0)
     raabro (1.4.0)
@@ -688,9 +687,6 @@ GEM
       concurrent-ruby (~> 1.0)
     uglifier (4.2.0)
       execjs (>= 0.3.0, < 3)
-    unf (0.1.4)
-      unf_ext
-    unf_ext (0.0.9)
     unicode-display_width (2.4.2)
     version_gem (1.1.3)
     warden (1.2.9)