diff --git a/Gemfile.lock b/Gemfile.lock
index 3ecf8b7d..6c233257 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,8 @@
 GEM
   remote: http://rubygems.org/
   specs:
-    addressable (2.3.8)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     daemons (1.2.3)
     diff-lcs (1.2.5)
     em-websocket (0.3.8)
@@ -12,6 +13,7 @@ GEM
     listen (3.0.5)
       rb-fsevent (>= 0.9.3)
       rb-inotify (>= 0.9)
+    public_suffix (5.0.0)
     rack (1.6.4)
     rack-protection (1.5.3)
       rack