diff --git a/Gemfile.lock b/Gemfile.lock
index d0199de..ad23280 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -36,7 +36,8 @@ GEM
       minitest (~> 5.1)
       thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    addressable (2.3.8)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     arel (6.0.2)
     better_errors (2.1.1)
       coderay (>= 1.0.0)
@@ -121,6 +122,7 @@ GEM
     pry-byebug (3.2.0)
       byebug (~> 5.0)
       pry (~> 0.10)
+    public_suffix (4.0.6)
     pygments.rb (0.6.3)
       posix-spawn (~> 0.3.6)
       yajl-ruby (~> 1.2.0)