diff --git a/Gemfile.lock b/Gemfile.lock
index 36b6aeb..aefd29b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -35,7 +35,8 @@ GEM
     activesupport (3.2.2)
       i18n (~> 0.6)
       multi_json (~> 1.0)
-    addressable (2.3.3)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     ansi (1.4.3)
     arel (3.0.2)
     bcrypt-ruby (3.0.1)
@@ -160,6 +161,7 @@ GEM
     premailer-rails3 (1.3.1)
       premailer (~> 1.7)
       rails (~> 3)
+    public_suffix (4.0.6)
     rack (1.4.5)
     rack-cache (1.2)
       rack (>= 0.4)