diff --git a/Gemfile.lock b/Gemfile.lock
index caf8084..1e1783c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -79,7 +79,7 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.12.2)
-    concurrent-ruby (1.1.4)
+    concurrent-ruby (1.1.5)
     connection_pool (2.2.1)
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
@@ -124,8 +124,8 @@ GEM
     govuk_frontend_toolkit (7.4.2)
       railties (>= 3.1.0)
       sass (>= 3.2.0)
-    govuk_notify_rails (2.0.0)
-      notifications-ruby-client (>= 2.0.0)
+    govuk_notify_rails (2.1.0)
+      notifications-ruby-client (>= 2.9.0)
       rails (>= 4.1.0)
     govuk_template (0.23.0)
       rails (>= 3.1)
@@ -147,7 +147,7 @@ GEM
       ruby_parser (~> 3.5)
     http-cookie (1.0.3)
       domain_name (~> 0.5)
-    i18n (1.5.3)
+    i18n (1.6.0)
       concurrent-ruby (~> 1.0)
     jaro_winkler (1.5.2)
     jquery-rails (4.3.1)
@@ -188,7 +188,7 @@ GEM
     nio4r (2.3.1)
     nokogiri (1.10.1)
       mini_portile2 (~> 2.4.0)
-    notifications-ruby-client (2.6.0)
+    notifications-ruby-client (3.1.0)
       jwt (>= 1.5, < 3)
     orm_adapter (0.5.0)
     parallel (1.14.0)