diff --git a/Gemfile.lock b/Gemfile.lock
index 5c7835f..1a6b84d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -8,7 +8,8 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.3.8)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     ast (2.3.0)
     celluloid (0.16.0)
       timers (~> 4.0.0)
@@ -58,6 +59,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
+    public_suffix (5.0.0)
     rainbow (2.2.2)
       rake
     rake (10.4.2)