diff --git a/Gemfile.lock b/Gemfile.lock
index 609675ce1..0059924e9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -120,7 +120,7 @@ GEM
       govuk_frontend_toolkit (>= 4.14.1)
       rails (>= 4.1.0)
       sass (>= 3.2.0)
-    govuk_frontend_toolkit (4.16.1)
+    govuk_frontend_toolkit (5.0.2)
       rails (>= 3.1.0)
       sass (>= 3.2.0)
     govuk_template (0.19.1)
@@ -155,7 +155,7 @@ GEM
     method_source (0.8.2)
     mime-types (2.99.3)
     mini_portile2 (2.1.0)
-    minitest (5.10.0)
+    minitest (5.10.1)
     multi_json (1.11.2)
     multi_test (0.1.2)
     multipart-post (2.0.0)
diff --git a/app/assets/stylesheets/components/_phase-banner.scss b/app/assets/stylesheets/components/_phase-banner.scss
deleted file mode 100644
index 136603f38..000000000
--- a/app/assets/stylesheets/components/_phase-banner.scss
+++ /dev/null
@@ -1,4 +0,0 @@
-.phase-banner {
-  @include phase-banner(beta);
-  border-bottom: 0;
-}