diff --git a/Gemfile.lock b/Gemfile.lock
index 4de9cff..774e5eb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,8 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     builder (3.2.2)
     capybara (2.6.2)
       addressable
@@ -41,6 +42,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
+    public_suffix (5.0.0)
     rack (1.6.4)
     rack-test (0.6.3)
       rack (>= 1.0)