diff --git a/Gemfile.lock b/Gemfile.lock
index 7b25e0fc0..d7c451048 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -232,7 +232,7 @@ GEM
       multi_json (~> 1.11)
       os (>= 0.9, < 2.0)
       signet (>= 0.16, < 2.a)
-    govuk_app_config (9.15.0)
+    govuk_app_config (9.15.1)
       logstasher (~> 2.1)
       opentelemetry-exporter-otlp (>= 0.25, < 0.30)
       opentelemetry-instrumentation-all (>= 0.39.1, < 0.69.0)
@@ -588,9 +588,8 @@ GEM
       rack (>= 3.0.0)
     rack-test (2.1.0)
       rack (>= 1.3)
-    rackup (2.1.0)
+    rackup (2.2.0)
       rack (>= 3)
-      webrick (~> 1.8)
     rails (7.2.2)
       actioncable (= 7.2.2)
       actionmailbox (= 7.2.2)