diff --git a/Gemfile.lock b/Gemfile.lock
index 5b11f583b..ffb4b3256 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -116,7 +116,7 @@ GEM
     google-protobuf (3.23.4)
     googleapis-common-protos-types (1.7.0)
       google-protobuf (~> 3.14)
-    govuk_app_config (8.1.1)
+    govuk_app_config (9.0.4)
       logstasher (~> 2.1)
       opentelemetry-exporter-otlp (~> 0.25.0)
       opentelemetry-instrumentation-all (~> 0.39.1)