diff --git a/Gemfile.lock b/Gemfile.lock
index 86ef65974..def93c9ee 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -166,8 +166,8 @@ GEM
     google-protobuf (3.25.3-aarch64-linux)
     google-protobuf (3.25.3-arm64-darwin)
     google-protobuf (3.25.3-x86_64-linux)
-    googleapis-common-protos-types (1.14.0)
-      google-protobuf (~> 3.18)
+    googleapis-common-protos-types (1.15.0)
+      google-protobuf (>= 3.18, < 5.a)
     govspeak (8.3.4)
       actionview (>= 6)
       addressable (>= 2.3.8, < 3)
@@ -193,7 +193,7 @@ 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
@@ -347,6 +347,10 @@ 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)
@@ -482,8 +486,9 @@ 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)
@@ -618,8 +623,8 @@ 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)