diff --git a/Gemfile.lock b/Gemfile.lock
index 9d480ed..92d67e6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -27,7 +27,8 @@ GEM
       minitest (~> 5.1)
       thread_safe (~> 0.1)
       tzinfo (~> 1.1)
-    addressable (2.3.8)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     arel (5.0.1.20140414130214)
     builder (3.2.2)
     capybara (2.4.4)
@@ -100,6 +101,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
+    public_suffix (5.0.0)
     rack (1.5.2)
     rack-test (0.6.3)
       rack (>= 1.0)