diff --git a/Gemfile.lock b/Gemfile.lock
index e713842..f965b07 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -28,8 +28,8 @@ GEM
     activesupport (3.2.22.5)
       i18n (~> 0.6, >= 0.6.4)
       multi_json (~> 1.0)
-    addressable (2.6.0)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     arel (3.0.3)
     autoparse (0.3.3)
       addressable (>= 2.3.1)
@@ -130,7 +130,7 @@ GEM
     openid (0.0.1)
     os (0.9.6)
     polyglot (0.3.5)
-    public_suffix (3.1.0)
+    public_suffix (5.0.0)
     rack (1.4.7)
     rack-accept (0.4.5)
       rack (>= 0.4)