diff --git a/Gemfile.lock b/Gemfile.lock
index 72efe47..ca875c9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -16,7 +16,8 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.3.4)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     builder (3.2.3)
     coderay (1.0.8)
     concurrent-ruby (1.1.5)
@@ -30,6 +31,7 @@ GEM
       coderay (~> 1.0.5)
       method_source (~> 0.8)
       slop (~> 3.4)
+    public_suffix (5.0.0)
     rspec (3.0.0)
       rspec-core (~> 3.0.0)
       rspec-expectations (~> 3.0.0)