diff --git a/Gemfile.lock b/Gemfile.lock
index cecc4d97..8e985cee 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -115,7 +115,7 @@ GEM
       rubocop (~> 0.58)
       rubocop-rspec (~> 1.28)
       scss_lint
-    govuk_app_config (1.9.0)
+    govuk_app_config (1.9.1)
       aws-xray-sdk (~> 0.10.0)
       logstasher (~> 1.2.2)
       sentry-raven (~> 2.7.1)