diff --git a/Gemfile.lock b/Gemfile.lock
index c990de52d..557012c06 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -99,7 +99,7 @@ GEM
       rest-client (~> 2.0)
     globalid (0.4.2)
       activesupport (>= 4.2.0)
-    govuk_ab_testing (2.4.1)
+    govuk_ab_testing (2.4.2)
     govuk_app_config (2.2.1)
       logstasher (>= 1.2.2, < 1.4.0)
       sentry-raven (>= 2.7.1, < 3.1.0)