diff --git a/Gemfile.lock b/Gemfile.lock
index 3f38d6c..e74a799 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -43,7 +43,8 @@ GEM
       minitest (~> 5.1)
       thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    addressable (2.4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     arel (6.0.3)
     builder (3.2.2)
     capybara (2.6.2)
@@ -106,6 +107,7 @@ GEM
     power_assert (0.2.7)
     protected_attributes (1.1.3)
       activemodel (>= 4.0.1, < 5.0)
+    public_suffix (3.1.1)
     quiet_assets (1.1.0)
       railties (>= 3.1, < 5.0)
     rack (1.6.13)