diff --git a/gateway/acceptance-tests/Gemfile.lock b/gateway/acceptance-tests/Gemfile.lock
index 4ad04da..776cfab 100644
--- a/gateway/acceptance-tests/Gemfile.lock
+++ b/gateway/acceptance-tests/Gemfile.lock
@@ -1,7 +1,8 @@
 GEM
   remote: http://rubygems.org/
   specs:
-    addressable (2.3.5)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     builder (3.2.2)
     capybara (2.2.1)
       mime-types (>= 1.16)
@@ -43,6 +44,7 @@ GEM
       coderay (~> 1.0)
       method_source (~> 0.8)
       slop (~> 3.4)
+    public_suffix (2.0.5)
     rack (1.5.2)
     rack-test (0.6.2)
       rack (>= 1.0)