diff --git a/Gemfile.lock b/Gemfile.lock
index e152a9d9..b16c6580 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -118,7 +118,7 @@ GEM
     coderay (1.1.3)
     coercible (1.0.0)
       descendants_tracker (~> 0.0.1)
-    concurrent-ruby (1.3.1)
+    concurrent-ruby (1.3.3)
     connection_pool (2.4.1)
     crack (1.0.0)
       bigdecimal
@@ -206,7 +206,7 @@ GEM
     govuk_personalisation (0.16.0)
       plek (>= 1.9.0)
       rails (>= 6, < 8)
-    govuk_publishing_components (38.4.1)
+    govuk_publishing_components (38.4.2)
       govuk_app_config
       govuk_personalisation (>= 0.7.0)
       kramdown
@@ -321,6 +321,10 @@ GEM
       opentelemetry-common (~> 0.20)
     opentelemetry-helpers-sql-obfuscation (0.1.0)
       opentelemetry-common (~> 0.20)
+    opentelemetry-instrumentation-action_mailer (0.1.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-active_support (~> 0.1)
+      opentelemetry-instrumentation-base (~> 0.22.1)
     opentelemetry-instrumentation-action_pack (0.9.0)
       opentelemetry-api (~> 1.0)
       opentelemetry-instrumentation-base (~> 0.22.1)
@@ -456,8 +460,9 @@ GEM
       opentelemetry-api (~> 1.0)
       opentelemetry-common (~> 0.21.0)
       opentelemetry-instrumentation-base (~> 0.22.1)
-    opentelemetry-instrumentation-rails (0.30.1)
+    opentelemetry-instrumentation-rails (0.30.2)
       opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-action_mailer (~> 0.1.0)
       opentelemetry-instrumentation-action_pack (~> 0.9.0)
       opentelemetry-instrumentation-action_view (~> 0.7.0)
       opentelemetry-instrumentation-active_job (~> 0.7.0)
@@ -530,7 +535,7 @@ GEM
     puma (6.4.2)
       nio4r (~> 2.0)
     racc (1.8.0)
-    rack (3.0.11)
+    rack (3.1.0)
     rack-protection (4.0.0)
       base64 (>= 0.1.0)
       rack (>= 3.0.0, < 4)
@@ -588,8 +593,8 @@ GEM
       http-cookie (>= 1.0.2, < 2.0)
       mime-types (>= 1.16, < 4.0)
       netrc (~> 0.8)
-    rexml (3.2.8)
-      strscan (>= 3.0.9)
+    rexml (3.3.0)
+      strscan
     rinku (2.0.6)
     rouge (4.2.1)
     rspec-core (3.13.0)