diff --git a/Gemfile b/Gemfile
index 3d6f266d9..85a139759 100644
--- a/Gemfile
+++ b/Gemfile
@@ -15,7 +15,7 @@ gem 'uglifier', '>= 1.3.0'
 
 gem 'gds-api-adapters', '~> 52.5'
 gem 'govuk_ab_testing', '~> 2.4'
-gem 'govuk_app_config', '~> 1.3'
+gem 'govuk_app_config', '~> 1.4'
 gem 'govuk_frontend_toolkit', '~> 7.4'
 gem 'govuk_publishing_components', '~> 6.2.0'
 gem 'plek', '~> 2.1'
diff --git a/Gemfile.lock b/Gemfile.lock
index e5ad7d648..649356c10 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -115,7 +115,7 @@ GEM
       rubocop-rspec (~> 1.19.0)
       scss_lint
     govuk_ab_testing (2.4.1)
-    govuk_app_config (1.4.1)
+    govuk_app_config (1.4.2)
       logstasher (~> 1.2.2)
       sentry-raven (~> 2.7.1)
       statsd-ruby (~> 1.4.0)
@@ -359,7 +359,7 @@ DEPENDENCIES
   gds-api-adapters (~> 52.5)
   govuk-lint
   govuk_ab_testing (~> 2.4)
-  govuk_app_config (~> 1.3)
+  govuk_app_config (~> 1.4)
   govuk_frontend_toolkit (~> 7.4)
   govuk_publishing_components (~> 6.2.0)
   govuk_schemas (~> 3.1)