diff --git a/Gemfile.lock b/Gemfile.lock
index e688836..33115d9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -28,7 +28,8 @@ GEM
     activesupport (3.2.6)
       i18n (~> 0.6)
       multi_json (~> 1.0)
-    addressable (2.3.2)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     arel (3.0.2)
     bcrypt-ruby (3.0.1)
     bootstrap-sass (2.0.0)
@@ -113,6 +114,7 @@ GEM
       mime-types
     pg (0.12.2)
     polyglot (0.3.3)
+    public_suffix (5.0.0)
     rack (1.4.1)
     rack-cache (1.2)
       rack (>= 0.4)